SOLUTION: Jenny has three more than twice the number of compact discs as Joshua. If Jenny has 27 compact discs, how many discs does Joshua own?

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Question 826288: Jenny has three more than twice the number of compact discs as Joshua. If Jenny has 27 compact discs, how many discs does Joshua own?
Answer by TimothyLamb(4379) About Me  (Show Source):
You can put this solution on YOUR website!
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x = Jenny
y = Joshua
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x = 2y + 3
x = 27
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put the system of linear equations into standard form:
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x - 2y = 3
x = 27
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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 = Jenny = 27
y = Joshua = 12
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system matrix
1 -2
1 0
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inverse of system matrix
0 1
-0.5 0.5
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determinant of system matrix = 2
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Solve systems of linear equations up to 6-equations 6-variables:
https://sooeet.com/math/system-of-linear-equations-solver.php