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Find the point on the graph of 3x-4y=45 where the y-coordinate is 3 times the x-coordinate.?

please help me and please write all your work too. Thanks!!! =D

2007-03-05 15:38:41 · 1 answers · asked by theblackcrusader 2 in Education & Reference ➔ Homework Help

1 answers

y = 3x
Substitute
3x-4(3x) = 45
3x - 12x = 45
-9x = 45
x = -5
y = 3x
y = 3(-5)
y = -15
The point is (-5,-15)

2007-03-05 15:46:26 · answer #1 · answered by lizzie 3 · 0⤊ 0⤋

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