SOLUTION: find the solution to problem by using system of equations by substitution. y=2x+7 y=-x-5

Algebra ->  Expressions-with-variables -> SOLUTION: find the solution to problem by using system of equations by substitution. y=2x+7 y=-x-5      Log On


   

Question 234679: find the solution to problem by using system of equations by substitution.
y=2x+7
y=-x-5
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
y=2x+7
y=-x-5
---------------
-x-5=2x+7
3x=-12
x=-4
----------------
y=2(-4)+7
y=-8+7
y=-1
-------------
-1=4-5