Question

X*8+(560-320)=70*3+490:7

Answer 1

X*8+(560-320)=70*3+490:7

8х+240=210+70

8х=210+70-240

8х=40

х=40:8

х=5

5*8+(560-320)=70*3+490:7

40+240=210+70

280=280

Answer 2

Спасибо