SOLUTION: x+4y=-8 x-4y=-8 use substitution method to solve

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Question 625464: x+4y=-8
x-4y=-8
use substitution method to solve

Answer by reynard2007(52) About Me  (Show Source):
You can put this solution on YOUR website!

You were given:
x%2B4y=-8
x-4y=-8
 
Use the second equation for the substitution.
x-4y=-8
x=4y-8
 
Substitute x with 4y-8
%284y-8%29%2B4y=-8
8y=-8%2B8=0
y=0
 
Look for the value of x by substituting y with 0
x%2B4%280%29=-8
x=-8
 
So x=-8 and y=0