Question

a) X x 48 + 52 x X = 160

b) 7 x ( 8+2xX) = 210

c ) X x 56 + 44 x X + 285 x X = 130

d) ( x -12 ) x 17 : 11 = 51

e) 915 x X + 285 x X = 48

g) ( X x 7 + 8 ) : 5 = 10

h) (X + 5 ) x 19 : 13 = 57 4x(36 - 4 x X)= 32

i) (X : 2 + 50 ) : 5 = 12

giúp mình với plese

 

 

 

 

Answer 1

a) X x 48 + 52 x X =160

X x ( 48+52) = 160

X x  100 = 160

X = 8/5 

b)   7 x ( 8+2xX) =210

8+2xX = 30

2xX= 22

X= 11

c) X x 56 + 44 x X+285 x X =130

X x ( 56+44+285)= 130

X x 385 =130

X = 26/77

d) (x-12) x 17 : 11= 51

( x-12) x17 =561

x-12 = 33

x= 45

e) 915 x X +285 x X =48

X x( 915+285) = 48

X x 1200 = 48

X =1/25

Answer 2

\(48x+52x=160\)

\(x.\left(48+52\right)=160\)

\(100x=160\)

\(x=\frac{160}{100}\)

\(x=1,6\)

Vậy \(x=1,6\)

Đăng ít thôi b

Answer 3

a) X x 48 + 52 x X = 160

X x ( 48 + 52 ) = 160

X x 100 = 160

X = 160 : 100

X = 1,6

Answer 4

b) 7 x ( 8 + 2 x X ) = 210

8 + 2 x X = 210 : 7

8 + 2 x X = 30

2 x X = 30 - 8

2 x X = 22

X = 22 : 2

X = 11

Answer 5

c) X x 56 + 44 x X + 285 x X = 130

X x ( 56 + 44 + 285 ) = 130

X x 385 = 130

X = 130 : 385

X = 130/385

Answer 6

( X - 12 ) x 17 : 11 = 51

( X - 12 ) x 17 = 51 x 11

( X - 12 ) x 17 = 561

X - 12 = 561 : 17

X - 12 = 33

X = 33 + 12

X = 45

Answer 7

e) 915 x X + 285 x X = 48

X x ( 915 + 285 ) = 48

X x 1200 = 48

X = 48 : 1200

X = 0,04.

Answer 8

g) ( X x 7 + 8 ) : 5 = 10

X x 7 + 8 = 10 x 5

X x 7 + 8 = 50

X x 7 = 50 - 8

X x 7 = 42

X = 42 : 7

X = 6

Answer 9

i) ( X : 2 + 50 ) : 5 = 12

X : 2 + 50 = 12 x 5

X : 2 + 50 = 60

X : 2 = 60 - 50

X : 2 = 10

X = 10 x 2

X = 20