Question 577267
How do I graph and determine the solution set of:
x=7-2y
Solve for "y":
2y = -x+7
y = (-1/2)x+(7/2)
Plot 2 points:
If x = 2, y = -1+(7/2) = 2 1/2
If x = 0, y = (7/2) = 3 1/2
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Plot (2,2 1/2) and (0, 3 1/2) and draw a line thru them.
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y=3x
If x = 0, y = 0
If x = 1, y = 3
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Plot (0,0) and (1,3) and draw a line thru them.
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Find the point of intersection of the 2 lines. 
That is the solution of the set of 2 solutions.
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{{{graph(400,400,-10,10,-10,10,3x,(-x+7)/2)}}}
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Cheers,
Stan H.