2*(15-8х)-3(5х-7)=-42

Question

2*(15-8х)-3(5х-7)=-42

Answer 1

2*(15-8х)-3(5х-7)=-42
30-16х-15х+21=-42
51-31х=-42
-31х=-42-51
-31х=-93
х=-93/(-31)
х=3
Ответ: х=3