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For certain values of k and m, the system

3a + 2b = 2

a + 2b = k - 8a - mb

has infinitely many solutions (a,b).  What are k and m?

 Aug 18, 2024
 #1
avatar+8 
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In order to have an infinite number of solutions, we want two equivalent equations  

 

Subtracting 3a from both sides gives us 3a+2b=k+mb. 

 

Because we want both equations to be equal to each other (meaning the left side matches), we can incorporate the equation k+mb=2

 

We want M to be an integer-- other than zero (except it cannot be other than zero because we want the equations to line up) 

 

 

We need m=0 so K would have to be 2

 

M=0

K=2

 Aug 18, 2024

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