SOLUTION: Adam is 12 years older than his sister Liz. Four years ago Adam was 4 times older than his sister. How old is each now?

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Question 1141067: Adam is 12 years older than his sister Liz. Four years ago Adam was 4 times older than his sister. How old is each now?
Answer by Alan3354(69443) About Me  (Show Source):
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Adam is 12 years older than his sister Liz. Four years ago Adam was 4 times older than his sister. How old is each now?
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A = L + 12
A-4 = 5*(L-4) = 5L-20
Sub for A
L+12 - 4 = 5L-20
L+8 = 5L-20
4L = 28
L = 7
A = 19