the sum of the age of wendy and her mother is 72. In how many years time will their age be 90?

The sum of the age of wendy and her mother is 72. In how many years time will their age be 90?
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time=(90-72/2=18/2=9 yeers
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The answer would be 18 years because you add 72+18=90

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you are forgetting that there are two people. Each person ages 1 year every 1 year.  This means the sum of their age increases by 2 each year.  Answer is 9
by Level 4 User (9.6k points)

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