Question

Решить уравнение (7x+9)-(11x-7)=8

Answer 1

7x+9-11x+7=8
-4x+16=8
-4x=8-16
-4x=-8
x=-8:(-4)
x=2
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проверка
(7*2+9)-(11*2-7)=8
23-15=8
8=8

Answer 2

7х+9-11х+7=8
7х-11х=-9+8-7
-4х=-8
х=-8:(-4)
х=2