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SVEN [57.7K]
3 years ago
15

Solve by elimination 5x+y=3 7x-3y=-31

Mathematics
1 answer:
IrinaK [193]3 years ago
8 0
5x+y=3|\cdot3\\
7x-3y=-31\\\\
15x+3y=9\\
\underline{7x-3y=-31}\\
22x=-22\\
x=-1\\\\
5\cdot(-1)-y=3\\
-5-y=3\\
-y=8\\
y=-8\\\\
\boxed{(x,y)=(-1,-8)}
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1

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How do you solve this?
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8      3

    -

9      4


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9(4)      4 (9)

=

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