SOLUTION: Eric is Ethan's older brother. The sum of their ages is 79 and the difference in their ages is 7. Write the system of equations that could be used to find the ages of the brothers.

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Question 1173550: Eric is Ethan's older brother. The sum of their ages is 79 and the difference in their ages is 7. Write the system of equations that could be used to find the ages of the brothers.

Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.

Let x be the Eric's age; y be the Ethan's age.  Then   


    x + y = 79

    x - y =  7


is the system of equations you are asking for.


The solution is  %2879%2B7%29%2F2 = 43 for Eric's age and  %2879-7%29%2F2 = 36 for Ethan's age.

Solved.