Question

R+L=12
48R+36L=528
what is the value of r and the value of l

Answer 1

R+L=12
R=12-L
48(12-L)+36L=528
576-48L+36L=528
-48L+36L=528-576
-12L=-48
L=4

R+4=12
R=12-4
R=8