Mom and daughter

Mother is 39 years old. Her daughter is 15 years. For many years will the mother be four times older than the daughter?

Correct answer:

x =  -7

Step-by-step explanation:

39+x=4 (15+x)  3x=21  x=321=7  x=7

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Showing 1 comment:
Q: Good explanation

A: -7 means that this moment was 7 years before.

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