Use a cubic formula and runing a line throgh it and making above and below equal area

How do you make the area above a line enclosed by the curve equal to the area below a line enclosed by the curve.

It is the same line running through the curve , x^3 - 14x^2 +59x - 70 , the line is mx -70, I need to find a value for m to make the area above the line enclosed by the curve equal to the area below the line enclosed by the curve

Re: Use a cubic formula and runing a line throgh it and making above and below equal

Except if m= 40, that line will cross the cubic **three times** giving two different regions.