Question

which choice is a solution to the system of equations below?
3y=9x+12
3x=y-4

A.infinitely many
B.(3,1)
C.(-3,1)
D.(3,-1)

Answer 1

divide the first equation by 3, get \[y=3x+4\]
second equation is
\[3x=y+4\] or
\[y=3x+4\]
evidently they are exactly the same line, just written differently

Answer 2

not the same, just parallel

Answer 3

typo there, second equation is
\[3x=y-4\] or
\[y=3x+4\]

Answer 4

no i made a typo
answer is correct though

Answer 5

what is the answer?

Answer 6

i would say no solution

Answer 7

both lines can be written as \(y=3x-4\) so they are the same line, and so there are infinitely many solutions

Answer 8

thank you!

Answer 9

yw

Answer 10

ups, you right. My misstake