SOLUTION: Hello, How do I solve this by the system by addition. I'm not sure how to go about it. This is what I get,but my friend says it's wrong. I'm loss fro this point on.

Question 47190: Hello,
How do I solve this by the system by addition. I'm not sure how to go about it.
This is what I get,but my friend says it's wrong. I'm loss fro this point on.
5x � 3y = 13
4x � 3y = 11
+_______________
9x - 6y= 11

Answer by adamchapman(301) (Show Source): You can put this solution on YOUR website!
5x � 3y = 13....................1
4x � 3y = 11....................2
rearrange (1):
-5x + 3y = -13..................3
Add (2) and (3):
4x � 3y + (-5x + 3y) = 11 -13 ..................4
-x=-2
x=2
substitute x=2 into (1):
10 - 3y = 13
-3y = 3
y=-1
So the solution is
x=2,
y=-1
I hope this helps,
Adam
P.S. please visit my website, it may be helpful to you. The address is www.geocities.com/quibowibbler
RELATED QUESTIONS
Tina can completely weed her vegetable garden in 1hr and 30 min. Her friend marisa can do (answered by ankor@dixie-net.com)

Hello I am not sure how to go about this. If the sides of a square are decreased by 3cm,... (answered by Earlsdon)

Here it is again! I know how to do this, I just don't have the resourse, can someone help (answered by Edwin McCravy)

m/m^2-m-12 + 5/m+3 This is what i came up with but i'm not exactly sure how i... (answered by stanbon)

I am not sure what kind of probelm this is or how to begin to solve it?? Can someone... (answered by solver91311)

Hi- I have been working on this problem and I think I am doing it right. I am about... (answered by jim_thompson5910)

I'm not sure if this is the section I go to for this question but I have M=3/2, (6, -5)... (answered by jim_thompson5910)

I need to solve for x and y by using substitution. I am not sure of how to go about... (answered by ankor@dixie-net.com)

Hello here is my question for my assisnment. Let's say you got a 78 on a Stats exam.... (answered by richwmiller)