Question

-v + 5 + 4v = 1 + 5v + 3

Answer 1

5+4v-v=1+3+5v
5+3v=4+5v
minus 3v both sides
5+3v-3v=4+5v-3v
5+0=4+2v
5=4+2v
minus 4 both sides
5-4=4-4+2v
1=0+2v
1=2v
divide both sides by 2
1/2=v

Answer 2

-v+5+4v=1+5v+3
The answer to your problem is v=1/2.