7х(6х-5)+42х=3х(5+14х)+49

Question

7х(6х-5)+42х=3х(5+14х)+49

Answer 1

7х(6х-5)+42х=3х(5+14х)+4942х-35+42х=15х+42х+49
42х+42х-42х=49+35
42х=84
х=84/42
х=2