Mathematics, 07.07.2020 19:01 alexdziob01

What is the missing coefficient? $(15x}^{2} + {11y}^{2} + 8x) - ( {7x}^{2} + {5y}^{2} + 2x) = \\ {?} {x}^{2} + \: {6y}^{2} + 6x$

What is the missing coefficient?

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