SOLUTION: a woman is 3 times as old as her son. In 12 years' time, the sum of their ages will be 76. How old was the woman when her son was born?

Question 924029: a woman is 3 times as old as her son. In 12 years' time, the sum of their ages will be 76. How old was the woman when her son was born?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = woman age now
y = son age now
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x = 3y
x + 12 + y + 12 = 76
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put the system of linear equations into standard form
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x - 3y = 0
x + y = 52
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = woman age now = 39
y = son age now = 13
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x - y = 39 - 13
x - y = 26
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answer:
the woman's age when son was born = 26
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