Question

Решите уравнение (2+3x)-(4x-7)=10

Answer 1

$2+3x-4x+7=10; 9-x=10; x=-1$

Answer 2

(2+3x)-(4x-7)=10
2+3х-4х+7=10
-1х=10-9
-1х=1/:(-1)
х=-1