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Question 828415: the sum of two numbers is -15. one number is 3 less than the other find a larger number
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! ---
x + y = -15
x = y - 3
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put the system of linear equations into standard form:
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x + y = -15
x - y = -3
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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 = -9
y = -6
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system matrix
1 1
1 -1
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inverse of system matrix
0.5 0.5
0.5 -0.5
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determinant of system matrix = -2
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