SOLUTION: 2.) Isabelle is 5 yrs older than her brother joseph. In 15 yrs the sum of their ages will be 65 yrs. Find the present age of each.

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Question 1012616: 2.) Isabelle is 5 yrs older than her brother joseph. In 15 yrs the sum of their ages will be 65 yrs. Find the present age of each.
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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I=Isabelle's age=B+5; B=Brother's age
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(I+15)+(B+15)=65
((B+5)+15)+(B+15)=65
2B+35=65
2B=30
B=15
ANSWER 1: Brother is 15 years old.
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I=B+5=15+5=20
ANSWER 2: Isabelle is 20 years old.
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CHECK:
(I+15)+(B+15)=65
(20+15)+(15+15)=65
35+30=65
65=65
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