Ui bài khó quá mk ko làm đc xl nhé.....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................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 X:0,1+X:0,25+X:0,5+X×4

⇒ x :0,1+ x :0,25+ X:0,5+x:0,25=2018

⇒ X:(0,1+0,25+0,5+0,25)=2018

⇒ X:1,1=2018

⇒ x=2018 x1,1=2219,8

 Vậy X=2219,8

\(x:0,1+x:0,25+x:0,5+x\cdot4=2018\)

\(x\cdot10+x\cdot4+x\cdot2+x\cdot4=2018\)

\(x\left(10+4+2+4\right)=2018\)

\(x\cdot20=2018\)

\(\Leftrightarrow x=100,9\)

P/s: Ko kho dau a :>

X : 0,25 + X:0,5-Xx4 =50,28

X x 4 + X x 2 - X x 4 = 50,28

X x 6 - X x 4 = 50,28

X x 2 = 50,28

X = 50,28 : 2 = 25,14

**** mik nha m.n !!!!

( X x 2 + 3 + 4 + 1 ) = 2130

X x 10    = 2130 

 X = 2130 : 10 

X = 213

Xx2+Xx3+Xx4+X=2130

Xx(2+3+4+1)      =2130

Xx10                 =2130

X                      =2130:10

X                      =213

đáp án 213

4x=22+2

4x=24

x=24:4

x=6

X x 4 - 2 = 22

X x 4 = 22 + 2 

X x 4 = 24

X = 24 : 4

X = 6

đúng nha !

x * 4 - 2 = 22 

x * 4 = 24 

x      = 24 : 4 

x      = 6

120-(Xx3+Xx4)=50

    Xx3+Xx4      =120-50

Xx(3+4)            =70

Xx7                  =70

X                      =70:7

X                      =10

x=100:4

x=25

Xx4=100

X   =100:4

X   =25

x=100:4

x=25