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3 years ago

7

Need help with solving a 2x2 system of linear equations PLEASE HELP ME

1 answer:

Yakvenalex [24]3 years ago

7 0

$\bf \begin{array}{llll}
-5x-y=5\\
-5x+y=5\\
-------\\
-10x+0=10
\end{array}\implies -10x=10\implies x=-1$

so if x = -1, let's plug that in the second equation

-5(-1)+y = 5
5+y = 5
y = 0

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