Maggie's brother is 5 years younger than four times her age. The sum of their ages is 60. How old is Maggie?

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22-05-2017
Mathematics

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Maggie's brother is 5 years younger than four times her age. The sum of their ages is 60. How old is Maggie?

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crisforp crisforp · Answer 1 · 2017-05-22T08:44:09+02:00

crisforp crisforp

22-05-2017

b = 4m - 5 and m + b = 60, where m is Maggie's age and b is her brother's age;
Then, m + 4m - 5 = 60;
5m = 65;
m = 65 ÷ 5;
m = 13 years;
b = 60 - 13;
b = 47 years;

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