Question

Tìm số nguyên \(x\), biết :

             \(x-\left(17-x\right)=x-7\)

Answer 1

x-(17-x)=x-7
x-17+x=x-7
x-17=x-7-x
x-17=-7
x=(-7)+17
x=10

Answer 2

x-(17-x)=x-7
x-17+x-x+7=0
(x+x-x)-(17-7)=0
x-10=0
x=0+10
x=10

Answer 3