SOLUTION: I am not exactly sure how to solve this. Can someone help me understand how to work this please... 4x-y=-33 -4x-4y=68 if x=-10 and y=-7 how do I complete this equation? Th

Algebra ->  Expressions-with-variables -> SOLUTION: I am not exactly sure how to solve this. Can someone help me understand how to work this please... 4x-y=-33 -4x-4y=68 if x=-10 and y=-7 how do I complete this equation? Th      Log On


   

Question 352574: I am not exactly sure how to solve this. Can someone help me understand how to work this please...
4x-y=-33
-4x-4y=68
if x=-10 and y=-7 how do I complete this equation? Thanks in advance
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Add the equations together,
4x-y-4x-4y=-33%2B68
-5y=35
highlight%28y=-7%29
Now use either equation to solve for x.
4x-y=-33
4x%2B7=-33
4x=-40
highlight%28x=-10%29