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Question 345925: Please help me graph this linear equation 3x-9y=18
Answer by haileytucki(390)   (Show Source):
You can put this solution on YOUR website! 3x-9y=18
Since 3x does not contain the variable to solve for, move it to the right-hand side of the equation by subtracting 3x from both sides.
-9y=-3x+18
Divide each term in the equation by -9.
-(9y)/(-9)=-(3x)/(-9)+(18)/(-9)
Simplify the left-hand side of the equation by canceling the common factors.
y=-(3x)/(-9)+(18)/(-9)
Simplify the right-hand side of the equation by simplifying each term.
y=(x)/(3)-2
and....
3x-9y=18
Since -9y does not contain the variable to solve for, move it to the right-hand side of the equation by adding 9y to both sides.
3x=9y+18
Divide each term in the equation by 3.
(3x)/(3)=(9y)/(3)+(18)/(3)
Simplify the left-hand side of the equation by canceling the common factors.
x=(9y)/(3)+(18)/(3)
Simplify the right-hand side of the equation by simplifying each term.
x=3y+6
Your plotted points are (6,0) (0, -2) (-3,-3) (-9,-5)
Put all of these on your graph and all of the points that your line crosses are also answers for x and y within this equation.
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