3 years ago

elie is now 4 times as old as her son. in 5 years time shes going to be 3 times as old as her son. how old is ellies son now?

Mathematics

1 answer:

tigry1 [53]3 years ago

5 0

Answer:

Her son is 10 years old.

Step-by-step explanation:

Let son be x

Ellie is 4x

In 5 years time: Her son = x + 5

Ellie = 4x + 5

Given that she will then be 3 times as old as her son: 4x + 5 = 3(x + 5)

Solve x: 4x + 5 = 3(x + 5) ,4x + 5 = 3x + 15

x = 10

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