SOLUTION: 5. 3X+Y=-8 5X-Y=-16 PLEASE EXPLAIN TO ME STEP BY STEP USING THE ELIMINATION BY ADDITION METHOD.

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: 5. 3X+Y=-8 5X-Y=-16 PLEASE EXPLAIN TO ME STEP BY STEP USING THE ELIMINATION BY ADDITION METHOD.      Log On

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Question 62474This question is from textbook beginning algebra
: 5. 3X+Y=-8
5X-Y=-16
PLEASE EXPLAIN TO ME STEP BY STEP USING THE ELIMINATION BY ADDITION METHOD.This question is from textbook beginning algebra

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
3X+Y=-8
5X-Y=-16 NOW JUST ADD THESE TWO EQUATIONS
------------------------------------
8X=-24
X=-24/8
X=-3 NOW SUBSTITUTE (-3) FOR X IN EITHER EQUATION & SOLVE FOR Y
3(-3)+Y=-8
-9+Y=-8
Y=-8+9
Y=1
PROOF
5(-3)-1=--16
-15-1=-16
-16=-16