Question 342318: How do you solve for x and y, and then graph these equations?
8x + 2y = 7
3x - 4y = 5
Answer by Fombitz(32388)   (Show Source):
You can put this solution on YOUR website! Multiply the first equation by 2 and add them,
Then use either equation to solve for 
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Convert both equations to slope intercept form,  .
Plot the y-intercept ( , ).
Then use the slope to calculate another point on the line.
Slope is change in y over change in x.
If  changes by  , then will change by  ,
Another point on the line would be,
(, )
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Plot the y-intercept (, ).
Then use the slope to calculate another point on the line.
If changes by  , then will change by  ,
Another point on the line would be,
(, )
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Note the intersection of the lines occurs at ( , ) as previously determined algebraically.
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