solve the following system of equation graphically 2x+3y=1 3x-y=7
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2x+3y=1.........1
3x-y=7............2. 2 la 3 NE gunu
9x-3y=21......3
9x-3y=21
-2x-3y=1
7x=20
x=20/7
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i) 2x - 3y = -2 and 3x + y = 5
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