What is the sum of all possible values of x such that 2x(x - 10) = -50 + 2x?
Eleven
2x(x - 10) = -50 + 2x
\(2x(x - 10) = -50 + 2x\\ 2x^2-20x-2x+50=0\\ 2x^2-22x+50=0\\ 1x^2-11x+25=0\\ x=\frac{11\pm\sqrt{121-100}}{2}\\ \text{sum of the roots =}11\)
