Question 517018: Nina is 11 years older than Nene. The sum of their age is 39. How old are they now? Found 2 solutions by jessica43, JBarnum:Answer by jessica43(140) (Show Source):
You can put this solution on YOUR website! To solve this problem you need to write what you know in equations. First, you know that Nina is 11 years older than Nene: I = 11 + E
Second, you know that the sum of their ages is 39: I + E = 39
Now plug the first equation into the second for I:
I + E = 39
(11 + E) + E = 39
11 + 2E = 39
2E = 28
E = 14
So Nene is 14. To find Nina's age, use the first equation:
I = 11 + E
I = 11 + 14
I = 25
So Nina is 25.
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