divide both sides by -11. both of the negavtive (-11) will cancel out and become d on the left and on the right 55 will be divided by -11 = -5. the 5 is negative because there's a negative -11 if there were a postive 11 it will be 5 instead of D=-5
Slope of the given line = 4 slope of the req. line = 4 equation of the line y - y1 = m(x - x1) y + 8 = 4(x - 3) y + 8 = 4x - 12 4x - y - 12 - 8 = 0 4x - y - 20 = 0