Х+(132×4)=684 215×3-х=124

Question

Х+(132×4)=684 215×3-х=124

Answer 1

Х+528=684
х=684-528
х=156

645-х=124
х=645-124
х=521

Answer 2

X+528=684              645-x=124
x=156                       x=521