+0  
 
0
392
1
avatar

Solve the system of equations x+y=4 and -9x+7y=-84 by combining the equations.

 Mar 5, 2021
 #1
avatar+237 
+1

x+y= 4   * 7

 

-9x+7y = -84

-

7x+7y = 28

 

-16x=-56

x=3.5 y=0.5

 Mar 5, 2021

2 Online Users

avatar
avatar