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Value of x. 3x+7y=31, -3x-2y=-1
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Value of x. 3x+7y=31, -3x-2y=-1

User Kevboh
by
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1 Answer

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Answer: -11/3

Explanation:

Adding the two equations, we get
5y=30 \implies y=6

Substituting this into the first equation,


3x+7(6)=31\\\\3x+42=31\\\\3x=-11\\\\x=\boxed{-(11)/(3)}

User Alexey Ryazhskikh
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5.3k points
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