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4x+3y-13=0 4x-3y-19=0 3x-4y-16=0 3x+4y-8=0
2x-y+2z=0 2x-y+2z=16 4x-3y+6z=42 4x-3y+6z=0
y=-10 y=3 y= y=4
2x -y+2z =0 2x-y+2z=16 4x-3y+6z=42 4x-3y+6z=0
4x+3y-13=0 4x-3y-19=0 3x-4y-16=0 3x+4y-8=0
4x+3y﹣13=0 4x﹣3y﹣19=0 3x﹣4y﹣16=0 3x+4y﹣8=0
y=x+1 y=-x3 y= y=x|x|
x+4x-5=0 4x-y+3=0 x+4y+3=0 4x-y-3=0
x+3y-4=0 x+3y-10=0 3x-y+4=0 3x-y=0
y=3x-1 y=3x+1 y=-3x+1 y=-3x-1
y3<y2<y1 y1<y2<y3 y2<y1<y3 y2<y3<y1
2x-y+2z=0 2x-y+2z=16 4x-3y+6z=42 4x-3y+6z=0