We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
173
3
avatar+701 

Which ordered pair is the solution to the system of equations?

{−5x−3y=12y=x−12

 

(3, −9)

(0, −4)

(−6, 6)

(1, −11)

 

would the answer be (3,-9)?

 Oct 30, 2018
edited by Guest  Oct 30, 2018
 #1
avatar+18360 
+1

Is this Q written correctly?

-5x - 3y = 12y

-5x = 15y

x = -3y         NONE of the options fit this equation.

 Oct 30, 2018
 #2
avatar+100579 
+2

I think this is supposed to be

 

-5x - 3y  =  12

y = x - 12

 

Sub the second equation into the first for y and we have

 

-5x - 3 ( x - 12)  = 12  simplify

 

-5x  - 3x + 36  = 12     

 

-8x + 36  = 12    subtract  36 from both sides

 

-8x  =  - 24    divide both sides by -8

 

x  = 3

 

And    y  =    3 -  12  =  -9

 

So you are correct!!!!....    (3 , -9)  is the solution

 

 

cool cool cool

 Oct 30, 2018
edited by CPhill  Oct 30, 2018
 #3
avatar+18360 
+1

Ahaaaaa!   It is all clear to me now !   Haha        cheeky

 Oct 30, 2018

11 Online Users

avatar
avatar