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Mrs.johnson is 5 times as old as her son. three years ago she was 8 times as old as her son was then. find each of their ages
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Oct 19, 2018
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Mrs.johnson is 5 times as old as her son. three years ago she was 8 times as old as her son was then. find each of their ages
Mathematics
high-school
Hartok
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let age of son = x years and y = age of Mrs Johnson, then:-
y = 5x
and
y- 3 = 8(x - 3)
plug y = 5x into the above:-
5x - 3 = 8x - 24
21 = 3x
x = 7
Sons age is 7 and Mrs Johnson's age is 35.
Ian Petts
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Oct 25, 2018
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Ian Petts
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