AALGEBRA
posted by DEBBIE on .
NEED HELP SOLVING 3h/2 = 30 and
3(3+r)= 2r+4
so 3x3=9,3xr=3r = 2r+4
9+3r=2r+4
99+4=3r+2r ?????

first one:
3h/2 = 30
multiply both sides by 2
3h = 60
divide both sides by 3
h = 20
second one:
3(3+r)= 2r+4
expand
9 + 3r = 2r + 4
3r  2r = 4  9
r = 5