+0  
 
0
117
1
avatar

For a certain value of the system

3a + 4b = 7

6a + 4b = k - 4b + 2a

 

has infinitely many solutions What is k?

 Feb 21, 2022
 #1
avatar+251 
+2

Here's a start...

 

In the equation 3a + 4b = 7, you can multiply through by 3 to get 9a + 12b = 21.

Next, in the equation 6a + 4b = k - 3a - 8b you can start by simplifying to 4a + 8b = k.

 Feb 21, 2022

38 Online Users

avatar