Question

Solve the given system, using the substitution method.

y=3x–4
9x–3y=14


A.
There is no solution.

B.
(12, 14)

C.
(14, 12)

D.
There are an infinite number of solutions.

Answer 1

So do you know what the first step is?

Answer 2

Its A. By the way

Answer 3

y=3x-4
9x-3y=14
sub in 3x-4 in for y in the 2nd equation
9x-3(3x-4)=14
9x-9x+12=14 ----- subtract 12 from each side
9x-9x=14-12
0=2

which is not right no answers

Answer 4

thanks @GretaKnows

Answer 5

did I do the math right?

Answer 6

i need to make sure because state testing is this month

Answer 7

well yes

Answer 8

thank you

Answer 9

Yeah. SInce 9x-9x is 0. x does not equal anything therefore there is no solution

Answer 10

another way to see it is
y=3x–4
9x–3y=14


y=3x-4 <---- slope is "3"

9x -3y - 14
-3y = -9x - 14
y = 3x +(14/3) <---- slope is "3"

same slope, lines are parallel, no solution, they never touch