Question

1) 7х+4=5+8х
2) 17-(5+4)=11
3) 2х+1=9

Answer 1

7х+4=5+8х

7х-8х=5-4

-х=1

х= -1

17-(5+4)=11

17-9=11

8≠11 → ∅

2х+1=9

2х=9-1

2х=8

х=8:2

х=4