7 2y 3y 13 July 8, 2019 16 32 64 128 7 2y 3y 13 y =- 1 X 2y 7 2x 3y 13 7 2x 3y 13 7x 2y 20 7 3y 9 13 2y 2 7+3y=9(y-2 1) 2 2y-7 и 3y-3
