=>1,2x=0,6

=>x=0,5

0,5

x.1,2-3,45=4,68

x.1,2=4,68+3,45

x.1,2=8,13

x=8,13:1,2

x=6,775

Xx1,2      =4,68+3,45

Xx1,2      =8,13

X             =8,13:1,2

X             =67,75

X x 1,2 - 3,45 =4,68

X x 1,2           = 4,68 + 3,45

X x 1,2           = 8,13

X                    = 8,13 : 1,2

X                    = 6,775

Đúng 100%

:D

\(x\times1,2+3,14\times x=1234\)

\(x\times\left(1,2+3,14\right)=1234\)

\(x\times4,34=1234\)

\(x=1234:4,34\)

\(x=284,3317972\)

Xx1,2 + 3,14xX = 1234

Xx(1,2 + 3.,14) = 1234

Xx4,34              = 1234

x                       = 1234 : 4,34

bn ơi xem lại xem có viết nhầm đề bài ko

X x 2+X x 1/6 =8/5

=> X x (2+1/6)=8/5

=> X x 13/6=8/5

 =>         X  =8/5:13/6

=>         X   =48/65

\(x\times2+x\times\dfrac{1}{6}=\dfrac{8}{5}\)

\(\Leftrightarrow2x\times2\times\dfrac{1}{6}=\dfrac{8}{5}\)

\(\Leftrightarrow2x\times\dfrac{1}{3}=\dfrac{8}{5}\)

\(\Leftrightarrow2x=\dfrac{8}{5}:\dfrac{1}{3}\)

\(\Leftrightarrow2x=\dfrac{8}{5}\times\dfrac{3}{1}\)

\(\Leftrightarrow2x=\dfrac{24}{5}\)

\(\Leftrightarrow x=\dfrac{24}{5}:2\)

\(\Leftrightarrow x=\dfrac{24}{5}\times\dfrac{1}{2}\)

\(\Leftrightarrow x=\dfrac{24}{10}\)

\(\Leftrightarrow x=\dfrac{12}{5}\)

sửa hộ chỗ nay thành này nha mình bấm nhanh quá nên hơi lỗi

\(x\times1,2+1,2\times3,8+x=12\)

\(x\times1,2+4,56+x=12\)

\(x\times\left(1,2+1\right)=12-4,56\)

\(x\times2,2=7,44\)

\(x=7,44:2,2=\frac{186}{55}\)

=Xx1,2+3,8 xX

=Xx5xX=12=12:5

X=1,4

\(Xx1,2=6,3\) 

\(x=6,3:1,2\)

\(x=5,25\)

Có chs nhưng ít khi chs lắm :)))

trl:

Xx1,2=6,3

x      =6,3:1,2

x      =5,25

hok tot 

\(x\times1,2=6,3\)

\(x=6,3:1,2\)

\(x=5,25\)

~ Hok tốt ~

Xx\(\frac{1}{4}\)+Xx\(\frac{1}{5}\)+Xx2=19,6

XxXxX=19,6:2:\(\frac{1}{5}\):\(\frac{1}{4}\)

Xx3=196

X=196:3

X=\(\frac{196}{3}\)

nhé bạn

\(x.\frac{1}{4}+x.\frac{1}{5}+x.2=19.6\)

\(x.\left(\frac{1}{4}+\frac{1}{5}+2\right)=19,6\)

\(x.2,45=19,6\)

\(x=19,6:2,45\)

\(x=8\)

\(x+x\cdot1,2+x\cdot1,8=4,92\)

\(x\cdot\left(1+1,2+1,8\right)=4,92\)

\(x\cdot4=4,92\)

\(x=1,23\)

a)\(\frac{5}{9}\times x-1=\frac{8}{9}\)

\(\frac{5}{9}\times x=\frac{8}{9}+1\)

\(\frac{5}{9}\times x=\frac{17}{9}\)

\(x=\frac{17}{9}:\frac{5}{9}\)

\(x=\frac{17}{5}\)

b)\(x+x\times\frac{1}{3}:\frac{2}{9}+x:\frac{2}{7}=252\)

\(x+x\times\frac{3}{2}+x:\frac{2}{7}=252\)

\(x.1+x.\frac{3}{2}+x.\frac{7}{2}=252\)

\(x\left(1+\frac{3}{2}+\frac{7}{2}\right)=252\)

\(x\times6=252\)

\(x=252:6\)

\(x=42\)

a,5/9.x-1=8/9

5/9.x=17/9

x=17/5

b,x+x.1/3:2/9+x:2/7=252

x+x.1/3.9/2+x.7/2=252

x(1+1/3.9/2+7/2)=252

x.6=252

x=42