SOLUTION: Janice is 1 year younger than her brother Billy and 1 year older than her sister Sheena. The sum of their ages is 57. How old is each child?

Question 824692: Janice is 1 year younger than her brother Billy and 1 year older than her sister Sheena. The sum of their ages is 57. How old is each child?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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x = Janice
y = Billy
z = Sheena
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x = y - 1
x = z + 1
x + y + z = 57
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put the system of linear equations into standard form
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x - y = -1
x - z = 1
x + y + z = 57
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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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answer:
x = Janice = 19
y = Billy = 20
z = Sheena = 18
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Solve systems of linear equations up to 6-equations 6-variables:
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