SOLUTION: Michael is 3 times as old as Brandon. 18 years ago, Michael was 9 times as old as Brandon. How old is Michael now?

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Question 1042665: Michael is 3 times as old as Brandon. 18 years ago, Michael was 9 times as old as Brandon.
How old is Michael now?

Found 2 solutions by jorel555, Fombitz:
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
Let Brandon be b. Then Michael is 3b. So:
3b-18=9(b-18)
3b-18=9b-162
6b=144
b=24
3b=72
Brandon is 24, Michael is 72. !!!!!!!

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
M=3B
.
.
.
M-18=9%28B-18%29
Substituting,
3B-18=9%28B-18%29
3B-18=9B-162
6B=144
B=24
and
M=3%2824%29
M=72