<PRE><B>Question 78613</B>
find the missing coordinate in the solutions for 3x-y+=-7

a. (?, 7) 
If y=7 you get 3x-7=-7; 3x=0; x=0
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    B. (2, ?)
If x=2 you get 3*2-y=-7; y=6+7; y=13
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another problem I have is

4x + y =5 by plotting points I need at least three 
If x=0, y=5
If y=0,x=5/4
if x=-1, y=9
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Cheers,
Stan H. </PRE>