For what values of k will the pair of equations 3(3x + 4y) = 36 and kx + 12y = 30 does not have a unique solution?
Select
A) 12	B) 9	C) 3	D) 7.5	E) 2.5
we have 2 equations   1. 3(3x + 4y) = 36 --&gt; 3x + 4y = 12 -- &gt; 9x + 12y = 36   2. kx + 12y = 30   substract 1-2, we get (9-K)x = 6   i.e. x = 6/(9-k)   then, by looking at options, we get some value of x except for B. When we put k=9, x becomes 6/0 and hence answer is 9
<result>B</result>
For what values of k will the pair of equations 3(3x + 4y) = 36 and kx + 12y = 30 does not have a unique solution?