SOLUTION: solve using any method (substitution, addition/subtraction, or multiplication). show work x=-2y 3x+y=10

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Question 373489: solve using any method (substitution, addition/subtraction, or multiplication). show work
x=-2y
3x+y=10
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
Substitute the top equation x = -2y into the bottom equation: 3(-2y) + y = 10.
-6y + y = 10,
-5y = 10,
y = -2. and x = -2*-2 = 4.