1.-20m+13=-2m-5
-20m+2m=-5-13
-18m=-18
m=1
2.-15m=m
-15m-m=0
-16m=0
m=0
3.-6y=6+6y
-6y-6y=6
-12y=6
y=-1/2
4.-2x+3=5x-4
-2y-5y=-4-3
-7y=-7
y=1
5.3/4x+3=5+1/4x
3/4x-1/4x=5-3
2/4x=2
x=4
6.-2/3x=3/2
x=--9/4
7.0.3x-1.5=x+0.6
0.3x-x=0.6+1.5
-0.7x=2.1
x=-3
8.0.125x+2.75=-1.25x
125x+2750=-1250x
125x+1250x=-2750
1375x=-2750
x=-2
9.035x-1.5=-2.15x+3.5
0.35x+2.15x=3.5+1.5
2.5x=5
x=2