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Emily is four years old Her big sister Amy is three times as old as Emily How old will Amy be when she is twice as old as Emily?
Wiki User
∙ 9y ago
Currently, Amy is 12 years old when Emily is 4.
In 4 years time, Amy will be 16, and Emily will be 8.
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Solve using the algebraic expression for the number of years x :
12 + x = 2 (4 + x)
12 + x = 8 + 2x
4 + x = 2x
4 = x
12 + 4 = 16, 4 + 4 = 8
Wiki User
∙ 9y ago
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