SOLUTION: The sum of Beth and Ashley's ages is 84. John's age is 12. The sum of all three ages is 120. Find their ages.

Question 931883: The sum of Beth and Ashley's ages is 84. John's age is 12. The sum of all three ages is 120. Find their ages.
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
x = beth age
y = john age
z = ashley age
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y + z = 84
y = 12
x + y + z = 120
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put the system of linear equations into standard form
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y + z = 84
y = 12
x + y + z = 120
---
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 = beth age = 36
y = john age = 12
z = ashley age = 72
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Solve systems of linear equations up to 6-equations 6-variables:
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