5x+3y+11=0\mathrm{5x+3y+11=0}5x+3y+11=0
5x+3y−11=0\mathrm{5x+3y-11=0}5x+3y−11=0
3x+5y+7=0\mathrm{3x+5y+7=0}3x+5y+7=0
3x+5y−7=0\mathrm{3x+5y-7=0}3x+5y−7=0