Answer:
24
Explanation:
You want to know Angel's age if Mr. Wu's age is 7 more than twice Angel's and the sum of their ages is 79.
Setup
Let angel's age be represented by 'a'. Then Mr. Wu's age is (2a+7), and the sum of their ages is ...
a +(2a +7) = 79
Solution
Subtracting 7, we have ...
3a = 72
a = 24 . . . . . . divide by 3
Angel's age is 24.
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Additional comment
Mr. Wu's age is 55.
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