Question

Tim x biet : - 12 ( x-5) + 7 ( 3 - x ) = 5

 

 

Answer 1

\(-12x+60+21-7x=5\)

\(-19x+81=5\)

\(-19x=-76\)

\(x=4\)

vậy....

Answer 2

\(-12.\left(x-5\right)+7.\left(3-x\right)=5\)

\(=>-12x+60+21-7x=5\)

\(=>-19x=5-81=-76\)

\(=>x=\frac{-76}{-19}=4\)

Answer 3

-12x+60+21-7x=5
-19x+81=5
-19x=-76
x=4

Answer 4

\(-12\left(x-5\right)+7\left(3-x\right)=5\)

\(-12x+60+21-7x=5\)

\(-12x-7x=5-60-21\)

\(-19x=-76\Leftrightarrow x=4\)

Answer 5

Tim x biet :

- 12 ( x-5) + 7 ( 3 - x ) = 5

- 12x + 60 + 21 - 7x = 5

-12x - 7x = 5 - 60 - 21

-19x=-76

     x=-76:(-19)

     x=4

Vậy x=4