Срочно!!!!!!!!! 7x-(x+3)=3 (2x-1)

Question

Срочно!!!!!!!!!
7x-(x+3)=3 (2x-1)

Answer 1

7x-x-3=6x-3
7x-x-6x=-3+3
0x=0

Answer 2

7х-(х+3)= 3(2х-1)
7 х-( х+3)=6х -3
х+3=7х-6х-3
2х=6
х=3
7*3-(3+3)=3(2*3-1)
15=15