Question

4道解方程

7x-8=x+4 5x-1=-2+3（x-1)

3/2 X-40=120-x 1+y/2-3=4

Answer 1

6x=12 x=2
2x=0 x=0
5/2x=160 x=64
-2+y/2=4 y/2=6 y=12