Помогите, срочно!! 3(5х-7)-7(4х+5)=х

Question

Помогите, срочно!!

3(5х-7)-7(4х+5)=х

Answer 1

15х-21-28х-35=х
15х-28х-х=21+35
-14х=56/ (-14)
х=-4

ответ: х=-4

Answer 2

15х - 21 - 28х - 35 = х
-13х - 56 = х
-13х - х = 56
-14х = 56
х = 56 : (-14)
х = - 4