solve for 1 variable
actually, simplify the top equation by dividing both sides by 2 first
2g-h=-3
2nd equation
solve for h
add4g both sides
h=13+4g
sub 13+4g for h in other equation
2g-h=-3
2g-(13+4g)=-3
2g-13-4g=-3
-13-2g=-3
add 13 both sides
-2g=10
divide -2
g=-5
sub back
h=13+4g
h=13+4(-5)
h=13-20
h=-7
g=-5
h=-7
