SOLUTION: Janet is 3 years older than her sister Julie. Janet's brother is 8 years younger than their sister Julie. The sum of all their ages is 55. How old are Janet, Julie and their brothe

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Question 925872: Janet is 3 years older than her sister Julie. Janet's brother is 8 years younger than their sister Julie. The sum of all their ages is 55. How old are Janet, Julie and their brother?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
x = janet age now
y = julie age now
z = brother age now
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x + y + z = 55
x = y + 3
z = y - 8
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put the system of linear equations into standard form
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x + y + z = 55
x - y = 3
y - z = 8
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = janet age now = 23
y = julie age now = 20
z = brother age now = 12
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