SOLUTION: X+y=16 Y=-5x How do I get the answer

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Question 1028918: X+y=16
Y=-5x
How do I get the answer
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
x+y = 16
y = -5x
:
substitute -5x for y in the first equation
:
x-5x = 16
:
-4x = 16
:
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x = -4
y = -5(-4) = 20
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:
check the answer by substituting for x and y in the first equation
:
-4 +20 = 16
:
16 = 16
:
our answer checks
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