1- (2-,1) 8 5x - 12y + 10 = 0
2-
x+2y=2 , x+2y=4 , y=2x-5
......
2-
x+2y=2 , x+2y=4 , y=2x-5
3- ( 2 -, 1) 3x-4y+5=0 (2,1)
: 1 (0 1 )
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