4x-6y=9 solve graphically
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4x-6y=9
4x=9+6y
x=9+6y\4
then
we put y=0
x=9/4
put y=1
x=15/4
put y=2
x=21/4
put y= -1
x=3/4
put y= -2
x= -3/4
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