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Math·Algebra·Systems of two linear equations in two variables

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$x+6y=-14$
$2x+12y=39$
$5x+30y=0$
The given equations are graphed in the $xy$-plane. How many solutions $(x,y)$ does the system of three equations have?

A

Zero

B

Exactly one

C

Exactly two

D

Infinitely many