anyway remember you can do anything to an equation as long as you do it to both sides
so
4n+2 and 1/2=2n+5 minus 2n both sides 4n-2n+2 and 1/2=2n-2n+5 2n+2 and 1/2=0+5 2n+2 and 1/2=5 minus 2 and 1/2 both sides 2n=2 and 1/2 divide both sides by 2 I mean times both sides by 1/2 n=1 and 1/4