You can put this solution on YOUR website! sandra is 36 years old. her son is 1 years old. how many years ago was sandra 3 times older than her son?
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The difference is 35 years.
3 times older = 4 times as old
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m = mother's age
s = son's age
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m = s+35
m = 4s
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4s = s+35
s = 35/3 years
m = 140/3 years
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Years ago = 36 - 140/3 = negative age
No solution.
