7x+5-2x=8 2x+5-2x= 3x-5=7-2x+3x+12 5x-2+2+4-4=2x 4x-12x+10x-24+7=2+3x

7x+5-2x=8
7x-2x=8-5
5x=3
x=3/5

3x-5=7-2x+3x+12
3x+2x-3x=7+12+5
2x=24
x=24÷2
x=12
5x-2+2+4-4=2x
5x-2x=4-4+2-2
3x=0
x=0÷3
x=0
4x-12x+10x-24+7=2+3x
4x-12x+10x-3x=2-24-7
-x=-29
x=29