(3x-1)(2x+7)-(x+1)(6x-5)=16
(3x-1)(2x+7)-(x+1)(6x-5)=16 6х^2-2x+21x-7-6x^2-6x+5x+5=16 18x=18 x=1
6х^2+21x-2x-7-6x^2+5x -6x+5=16 18x=18 x=1