SOLUTION: Sally is 18 years older than her son. She was 3 times as old as he was 1 year ago. How old are they now? I mainly need help on how to set it up. Thank you for taking your time

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Question 614627: Sally is 18 years older than her son. She was 3 times as old as he was 1 year ago. How old are they now?
I mainly need help on how to set it up. Thank you for taking your time to help me!

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
let +a+ = Sally's age now
Let +b+ = her Son's age now
given:
(1) +a+=+b+%2B+18+
(2) +a+-+1+=+3%2A%28+b+-+1+%29+
--------------------
This is 2 equations with 2 unknowns
so it's solvable