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=> 6y =-4y + 16
=> 6y + 4y = 16
=> 10y = 16
=> y = 16/10
=> y =8/5
la otra es (x-2)(x+5)=3
=> x² -2x +5x - 10 = 3
=> x² + 3x - 10 - 3 = 0
=> x² + 3x -13 = 0 y luego aplicas la formula general y ya sacas los valores de X