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