45th birthday

This year Mrs. Clever celebrated her 45th birthday. Her three children are now 7, 11 and 15 years old. In how many years will Mrs. Clever's age be equal to the sum of her children's years?

Correct result:

x =  6

Solution:

45+x = (7+x)+(11+x)+(15+x)

2x = 12

x = 6

Our simple equation calculator calculates it.

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