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

Algebra ->  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

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   

Question 234679: find the solution to problem by using system of equations by substitution.
y=2x+7
y=-x-5
Answer by rfer(2688) 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