SOLUTION: solve the system by substitution 3x-y=50 x= -3y

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Question 376395: solve the system by substitution 3x-y=50 x= -3y
Found 2 solutions by robertb, mananth:
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Substituting the 2nd eqn into the 1st eqn, we get 3(-3y) - y = 50, or -9y - y = 50, or -10y = 50, or y = -5. Then x = -3*-5 = 15

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
3x-y=50 x= -3y
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plug the value of x in first equation
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3*(-3y)-y=50
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-9y-y=50
-10y=50
y=-5
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x = -3*-5
x=15
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%28highlight%28x=15+y=-5%29%29
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m.ananth@hotmail.ca