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.

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) (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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