<PRE><B>Question 827554</B>
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x = nickels
y = dimes
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x + y = 30
5x + 10y = 145
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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 = nickels = 31
y = dimes = -1
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system matrix
1 1
5 10
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inverse of system matrix
2 -0.2
-1 0.2
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determinant of system matrix = 5
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Solve and graph linear equations:
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Solve quadratic equations, quadratic formula:
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Solve systems of linear equations up to 6-equations 6-variables:
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