+0  
 
+1
321
5
avatar

4x+2y=14

 Nov 30, 2017
 #1
avatar
0

PLEASE HELP ME

 Nov 30, 2017
 #3
avatar+95883 
+1

We need two equations in order to use elimination....

 

 

cool cool cool

 Nov 30, 2017
 #4
avatar
0

2x+4y=22

2x-2y=14

 Nov 30, 2017
 #5
avatar+7348 
+3

2x + 4y  =  22

2x - 2y  =  14

 

Multiply the second equation through by  2 . So the two equations become:

 

2x + 4y  =  22

4x - 4y  =  28

 

Now add the two equations together to get...

 

6x + 0  =  50

 

6x  =  50          Divide both sides of this equation by  6 .

x  =  25/3

 

Now lets plug this value for  x  back into one of the equations to find  y .

 

2(25/3) + 4y  =  22         Multiply  2(25/3)  to get  50/3 .

 

50/3 + 4y  =  22              Subtract  50/3  from both sides of this equation.

4y  =  22 - 50/3

4y  =  16/3                      Divide both sides by  4 .

y  =  4/3

 Nov 30, 2017

22 Online Users

avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.