-8z + 5z = -3z
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Mid-point: (3z+z)/2, (2z+8z)/2 = (2z, 5z) Slope: (8z-2z)/(3z-z) = 6z/2z = 3 Perpendicular slope: -1/3 Equation: y -5z = -1/3(x -2z) => y = -1/3x+2z/3+5z => y = -1/3x+17z/3 General form of the bisector equation: x+3y-17z = 0
It is: 5(z+5) = 5z+25
If you mean: 4+5z+3-8 then it is 5z-1
By collecting like terms: 8z+4-2x
9z-5z = 30+z 3z = 30 z = 10