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Age problem

1) Aning is seven years younger than Mameng. Five years hence, the sum of their ages w
be 31. How old is each?

person:mameng, aning
present age in years:
mameng: x
Aning: x-7

age in 5 years:
Mameng: x+_
Aning: x-7+_

Representation:

Equation:

Checking

Solution:​