Question

х+320=80×7, х-180=240÷3,400-х=275+25.

Answer 1

Х+320=560
Х=560-320
Х=240


Х-180=80
Х=180-80
Х=100
400-х=300
-х=300-400
-х=-100
Х=100

Answer 2

 400-х=300  -х=300-400  -х=-100 х=100