+0  
 
0
61
1
avatar

-2x-5y=49 ; 4x+3y=35 /using elimination method/ SHOW WORK​

Guest Jul 13, 2017
edited by Guest  Jul 13, 2017

Best Answer 

 #1
avatar+4155 
+2

To do the elimination method, line the two equations up and add them together.

 

-2x - 5y  =  49

4x + 3y  =  35

 

We could add them together now, but it won't help us find the value of  x  or  y . So multiply the first equation through by  2  .

 

-4x - 10y  =  98

 

Now line this up with the second equation and add them together.

 

 -4x - 10y  =  98

  4x  + 3y  =  35   

   0   - 7y   =  133

 

-7y  =  133                Divide both sides of this equation by -7 .

y  =  -19

 

Plug this value for  y  into either equation to find the value of  x  .

 

-2x - 5(-19)  =  49

-2x + 95  =  49          Subtract  95  from both sides of this equation.

-2x  =  -46                 Divide both sides of this equation by  -2  .

x  =  23

hectictar  Jul 13, 2017
Sort: 

1+0 Answers

 #1
avatar+4155 
+2
Best Answer

To do the elimination method, line the two equations up and add them together.

 

-2x - 5y  =  49

4x + 3y  =  35

 

We could add them together now, but it won't help us find the value of  x  or  y . So multiply the first equation through by  2  .

 

-4x - 10y  =  98

 

Now line this up with the second equation and add them together.

 

 -4x - 10y  =  98

  4x  + 3y  =  35   

   0   - 7y   =  133

 

-7y  =  133                Divide both sides of this equation by -7 .

y  =  -19

 

Plug this value for  y  into either equation to find the value of  x  .

 

-2x - 5(-19)  =  49

-2x + 95  =  49          Subtract  95  from both sides of this equation.

-2x  =  -46                 Divide both sides of this equation by  -2  .

x  =  23

hectictar  Jul 13, 2017

4 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