6х - (2х+13)-(х-7)=15х

Question

6х - (2х+13)-(х-7)=15х

Answer 1

6х-2х-13-х+7=15х
3х-15х=-7+13
-12х=6
х=-0,5

Answer 2

6х-(2х+13)-(х-7)=15х
6х-2х-13-х+7=15х
6х-2х-х-15х=13-7
-12х=6
х=-1/2 или 0,5