3x+2=0
3x=-2
x=-2/3
8x-5=x-40
8x-x=-40+5
7x=-35
x=-35/7
x=-5
7t+21=t-3
7t-t=-3-21
6t=-24
t=-24/6
t=-4
9+13y=35+26y
13y-26y=35-9
-13y=26
y=-26/13
y=-2
6x+(3x-2)=14
6x+3x-2=14
9x=14+2
9x=16
x=16/9
8y-(7y-142)=51
8y-7y+142=51
y=51-142
y=-91
(6x+1)-(3-2x)=14
6x+1-3+2x= 14
8x=14-1+3
8x=16
x=16/8
x=2
(6-2x)+4=-5x-3
6-2x+4=-5x-3
-2x+5x=-3-6-4
3x=-13
x=-13/3