Question 188409
solve each of the following systems of equations graphically if possible. indicate whether the system has a unique solution, infinitle many solutions or no solution. 
3y= x-10
y= x-2 

x+y=5
3x+3y= 15
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dl the (free) software at www.padowan.dk.com/graph/
You can graph these, see the solutions, change the colors, print them, and a lot of other things.