+0  
 
0
277
1
avatar

3x-2y=2 5x-5y=10

 Oct 21, 2017
 #1
avatar+95859 
+2

3x-2y=2  (1)

5x-5y=10   divide through by 5 → x - y  =  2 ..add y to both sides → x = 2 + y  (2) 

 

Sub (2) into (1)

 

3(2 + y) - 2y  = 2

6 + 3y - 2y  = 2

6 + y  = 2    subtract 6 from both sides

y = -4

 

And using  (2),   x = 2 + y →  2 + (-4) →  -2

 

 

cool cool cool

 Oct 21, 2017

22 Online Users

avatar
avatar
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.