Question

Tìm số nguyên:

11-(15+x)=x-(25-9)

Answer 1

\(11-\left(15+x\right)=x-\left(25-9\right)\)

\(11-15-x=x-\left(25-9\right)\)

\(11-15+\left(25-9\right)=x+x\)

\(12=2x\)

\(x=6\)

Answer 2

11-(15+x)=x-(25-9)

11-15-x=x-25+9

-x-x=-25+9-11+15

-2x=38

x=-19

Answer 3

sorry nha ,mk tính nhầm

Sửa: -2x=-12

           x=6