Seaonnaspratt Seaonnaspratt

14-12-2016
Mathematics

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Solve this system of equations by any method.
5x + y = -13
4x + 3y= -17

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texaschic101 texaschic101

14-12-2016

5x + y = -13.....multiply by -3
4x + 3y = -17
-----------------
-15x - 3y = 39 (result of multiplying by -3)
4x + 3y = -17
-----------------add
-11x = 22
x = -22/11
x = -2

5x + y = -13
5(-2) + y = -13
-10 + y = -13
y = -13 + 10
y = -3

solution (-2,-3)

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