NEED HELP SOLVING 3h/2 = 30 and

Question

3(3+r)= 2r+4

so 3x3=9,3xr=3r = 2r+4
9+3r=2r+4
9-9+4=3r+2r ?????

Answer 1

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