SOLUTION: the sum of the ages of a girl and her brother is 26 years.three years ago her age was four times the age of her brother.the find out the present ages of the girl and her brother??

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Question 1070330: the sum of the ages of a girl and her brother is 26 years.three years ago her age was four times the age of her brother.the find out the present ages of the girl and her brother??
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39621) About Me  (Show Source):
You can put this solution on YOUR website!
x, the girl
y, her brother

system%28x%2By=26%2Ccross%28x-3=3%28y-3%29%29%2Cx-3=4%28y-3%29%29

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26-y-3=4y-12------Mistake now corrected
23-y=4y-12
23%2B12=5y
5y=35


highlight%28cross%28y=8%29%29
highlight%28y=7%29

Answer by ikleyn(52815) About Me  (Show Source):
You can put this solution on YOUR website!
.
The correct answer is: the brother is 7 years old now.
                       the sister is 19 years now.

The answer and the solution by "josgarithmetic" are wrong.


There is a bunch of lessons on age word problems
    - Age problems and their solutions
    - A fresh formulation of a traditional age problem
    - Really intricate age word problem
    - Selected age word problems from the archive
in this site.

Read them and become an expert in solving age problems.

Also, you have this free of charge online textbook in ALGEBRA-I in this site
    - ALGEBRA-I - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Age word problems".