12-(4х+5)=7+х решите плиззз

Question

12-(4х+5)=7+х решите плиззз

Answer 1

12-(4x+5)=7+x
12-4x-5=7+x
12-5-7=x+5x
6x=0
x=0

Answer 2

12-4х-5=7-х
-3х=7+5-12
-3х=0
х=0
__________
12-4*0-5=7-0