SOLUTION: [ If Jason were 57 less than 6 times his present age, he would be 3 times as old as he was 4 years ago. how old is he? ]

Question 826268: [ If Jason were 57 less than 6 times his present age, he would be 3 times as old as he was 4 years ago. how old is he? ]
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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x = Jason's age now
y = Jason's age (hypothetical)
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y = 6x - 57
y = 3(x - 4)
y = 3x - 12
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put the system of linear equations into standard form:
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6x - y = 57
3x - y = 12
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copy and paste the above linear system in standard form into this matrix-method solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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solution:
x = Jason's age now = 15
y = Jason's age (hypothetical) = 33
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system matrix
6 -1
3 -1
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inverse of system matrix
0.33333333 -0.33333333
1 -2
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determinant of system matrix = -3
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php
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