Question

20*(x-3)=180
2x+5=37
8(x+5)=72
7(x-5)=11
15(x+6)=120

Answer 1

x-3=180:20
x-3=9
x=9+3
x=12

2x=37-5
2x=32
x=32:2
x=16

x+5=72:8
x+5=9
x=9-5
x=4

x-5=11/7
x=11/7+5 amplificãm pe 5 cu 7
x=11/7+35/7
x=46/7

x+6=120:15
x+6=8
x=8-6
x=2