+0  
 
0
61
1
avatar

Can someone help me solve...

  4x+9y=7

  4x-9y=9

 

Using the combination method?

Guest Mar 7, 2017

Best Answer 

 #1
avatar+10613 
+10

Sure !   Just add the two equations together to get:

8x =16     x = 2

 

4(2) -9y = 9

8--9y = 9

-9y=1

y = -1/9

ElectricPavlov  Mar 7, 2017
Sort: 

1+0 Answers

 #1
avatar+10613 
+10
Best Answer

Sure !   Just add the two equations together to get:

8x =16     x = 2

 

4(2) -9y = 9

8--9y = 9

-9y=1

y = -1/9

ElectricPavlov  Mar 7, 2017

8 Online Users

We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  See details