Question

find the piont on the graph of 3x-4y=9 where the y- coordinate is 3 times the x-coordinate

Answer 1

y-coordinate is 3 times the x-coordinate → y = 3x

Substitute to the equation 3x - 4y = 9:

3x - 4(3x) = 9

3x - 12x = 9

-9x = 9     divide both sides by (-9)

x = -1

y = 3(-1)

y = -3

Answer: (-1, -3).

Answer 2

Answer:

(-1, -3)

Step-by-step explanation: