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18-12-2018
Mathematics

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Mrs. Johnson is 3 times as old as her son. Ten years ago she was 5 times as old as her son was then. Find each of their ages

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26-12-2018

Answer:

her son is 20, Mrs. Johnson is 60

Step-by-step explanation:

if her son is x, Mrs. Johnson is 3x,

Ten years ago,

her son is x-10, Mrs. Johnson is 3x-10,

so:

3x-10=5(x-10)

x=20

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