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Question Number 123062 by pete last updated on 22/Nov/20

Erica′s age is 8 years and her mother is 42.  In how many years time will the mother be  3 times as old as her daughter?

$$\mathrm{Erica}'\mathrm{s}\:\mathrm{age}\:\mathrm{is}\:\mathrm{8}\:\mathrm{years}\:\mathrm{and}\:\mathrm{her}\:\mathrm{mother}\:\mathrm{is}\:\mathrm{42}. \\ $$$$\mathrm{In}\:\mathrm{how}\:\mathrm{many}\:\mathrm{years}\:\mathrm{time}\:\mathrm{will}\:\mathrm{the}\:\mathrm{mother}\:\mathrm{be} \\ $$$$\mathrm{3}\:\mathrm{times}\:\mathrm{as}\:\mathrm{old}\:\mathrm{as}\:\mathrm{her}\:\mathrm{daughter}? \\ $$

Answered by JDamian last updated on 22/Nov/20

42+y=3(8+y)  42+y=24+3y  18=2y  y=9

$$\mathrm{42}+{y}=\mathrm{3}\left(\mathrm{8}+{y}\right) \\ $$$$\mathrm{42}+{y}=\mathrm{24}+\mathrm{3}{y} \\ $$$$\mathrm{18}=\mathrm{2}{y} \\ $$$${y}=\mathrm{9} \\ $$

Commented by pete last updated on 22/Nov/20

Thank u so much sir

$$\mathrm{Thank}\:\mathrm{u}\:\mathrm{so}\:\mathrm{much}\:\mathrm{sir} \\ $$

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