Substitution and find plots

User Generated

puevfflru

Mathematics

Description

6x-9y=3

x+3y=0

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Explanation & Answer

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The goal is to get y alone.

1. 6x-9y=3 (divide by 3 to the whole equation)

2x-3y=1 (subtract 2x from both sides)

-3y=-2x+1  (divide by -3 to the whole equation)

y=2/3x-1/3

Just use random x values, to find some y values

x
y
0
-1/3
1
1/3
2
1


(0,-1/3)(1,1/3)(2,1)

2. x+3y=0 (subtract x from both sides)

3y=-x (divide by three to both sides)

y=-x/3

x
y
0
0
1
-1/3
 2 -2/3
(0,0),(1,-1/3) (2,-2/3)


Note there are a ton more points, you just keep using different x values to find more points.

Please let me know if you need any clarification. I'm always happy to answer your questions. Leave a positive review if you are happy!


Anonymous
Excellent resource! Really helped me get the gist of things.

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