Question

Решите двумя способами:
9,4-(x+7,4)=9

Answer 1

9,4-(x+7,4)=9

1)

х+7,4=9,4-9

х=0,4-7,4

х=-7

2)

9,4-х-7,4=9

-х=9-2

-х=7

х=-7