4x-9=1-2x
X=2
X=10
X=7
X=5/3
X=1
X=20
x-3=9
4x+3=21-2x
X=3
9x-4x+10=7x-30
X-4=6
-(x+1)=8
2(3x-2)=2
x+5=20-4x
4+4x=12
X=15/5
2(1+2x)=10
X=12