Question

x + 2y + 2 = 0 and 3x + 6y - k Find the value of "k" if the solution is infinite.

(A) -12 (B) -2 (C) -3 (D) -6
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Answer 1

Answer:

D is the answer.

Step-by-step explanation:

equation 1 is x+2y+2=0

equation 2 is 3x+6y-k=0

(equation 1)*3 = 3x+6y+6=0 this is equation 3

subtract equation 3 and 2

then k+6=0

k= -6

Answer 2

x+2y+2=0

x+2y=-2

x+y=-1

x=1

y=-2

3.1+6.-2-k

3+-12-k

-9-k

k=-6