SOLUTION: 6u+3v=-15 8u-5v=7 Solve system of equation by using substitution

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Question 665169: 6u+3v=-15
8u-5v=7
Solve system of equation by using substitution
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
6u+3v=-15 divide by 3 --> 2u + v = -5
8u-5v=7
Solve system of equation by using substitution
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2u + v = -5 --> v = -2u - 5
8u - 5v = 7
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Sub for v in the 2nd equation
8u - 5*(-2u-5) = 7
Can you finish it?