Question

(-12)².x=56+10.13.x

Answer 1

(-12)^2.x =56+10.13.x 
144.x =56+130.x 
144.x-130.x =56 
14.x =56 
x=4 
Vậy x=4. 

Answer 2

\(\left(-12\right)^2.x=56+10.13.x\)

\(144.x=56+130.x\)

\(144.x-130.x=56\)

\(x.\left(144-130\right)=56\)

\(x.14=56\)

\(x=56:14\)

\(x=4\)

Vậy \(x=4\)

Answer 3

(-12 \(^2\)) . x = 56 + 10.13.x
144.x = 56 + 130.x
144.x - 130.x = 56
14x = 56
x = 56 : 14
x = 4
Vậy x = 4

:D