-3r+18=6r
18 = 6r + 3r
18 = 9r
18/9 = r
? = r
-3r+18=6r
2 answers
_3r+18=6r
add 3r to ech side of equation.
18=9r
dived each side by 2
2=r
r=2
add 3r to ech side of equation.
18=9r
dived each side by 2
2=r
r=2