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Grace [21]
3 years ago
15

What are the solutions of the system 7x + 3y = -3 and y = -2 x ?

Mathematics
1 answer:
Alexxandr [17]3 years ago
4 0
7x+3y=-3\\
y=-2x\\
So \\
7x+3(-2x)=-3
7x-6x=-3⇔x=-3\\
y=-2x=6\\
So\  (x,y)=(-3,6).
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