SOLUTION: Solve this system: x - 3y = 9 5x - 15y = 45

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Question 176581: Solve this system:
x - 3y = 9
5x - 15y = 45
Answer by jojo14344(1513) About Me  (Show Source):
You can put this solution on YOUR website!

Line Eqn's:
x+-+3y+=+9+ , EQN 1
5x+-+15y+=+45+,divide the whole eqn by 5
%285x%2F5%29-%2815y%2F5%29=45%2F5
x-3y=9, EQN 2=EQN1
Via Slope-intercept Form: y=mx%2Bb
3y=x-9--->cross%283%29y%2Fcross%283%29=%28x-9%29%2F3=%281%2F3%29x-%289%2F3%29
y=%281%2F3%29x-3---> Line eqn.
f%28y%29=0
%281%2F3%29x=3
highlight%28x=9%29
f%28x%29=0
highlight%28y=-3%29

Thank you,
Jojo