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What is the sum of all possible values of x such that 2x(x - 10) - x(x - 5) = -50?

 Jul 25, 2021
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2x(x - 10) - x(x - 5) = -50

2x^2 - 20x - x^2 + 5x + 50 = 0

x^2 -15x + 50 = 0

(x-10)(x-5) = 0                 x = 10 and 5    sum = 15

 Jul 25, 2021

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