10x-13=2x+26
8x=26+13
8x=39
x=39/8
x=4.875
4y-15=2y+5
2y=15+5
y=10
18a+3=6a+15
12a=12
a=1
-3x+2=x-6
-4x=-8
x=2
-10x+20=-4x+10
-6x=-10
x=10/6
x=1.6
10x-13=2x+26
8x=26+13
8x=39
x=39/8
x=4.875
4y-15=2y+5
2y=15+5
y=10
18a+3=6a+15
12a=12
a=1
-3x+2=x-6
-4x=-8
x=2
-10x+20=-4x+10
-6x=-10
x=10/6
x=1.6