SOLUTION: Kendall is Jamal's older brother. The sum of their ages is 39. The difference of their ages is 9. How old are Kendall and Jamal?

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Question 948702: Kendall is Jamal's older brother. The sum of their ages is 39. The difference of their ages is 9. How old are Kendall and Jamal?








Found 2 solutions by macston, brysca:
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
Kendall is Jamal's older brother. The sum of their ages is 39. The difference of their ages is 9. How old are Kendall and Jamal?
K=Kendall's age; J=Jamal's age
K-J=9 Solve this equation for K and substitute in the next equation
K=9+J
K+J=39 Substitute for K.
9+J+J=39 Subtract 9 from each side.
2J=30 Divide each side by 2.
J=15 ANSWER 1: Jamal is 15 years old.
K=9+J=9+15=24 ANSWER 2: Kendall is 24 years old.
CHECK:
Sum is 39
K+J=39
24+15=39
39=39
Difference is 9
K-J=9
24-15=9
9=9


Answer by brysca(112) About Me  (Show Source):
You can put this solution on YOUR website!
solution posted below
.
hope this helps!