Y+(8-3y) , 2x-(13-5x)+9 , 7y+(6-y)-11y Решите пожалуйста
Y+(8-3y) = y + 8 - 3y -2y + 8 8 = 2y 4 = y 2x-(13-5x)+9 = 2x - 13 + 5x + 9 7x - 4 7x = 4 x = 4/7 7y+(6-y)-11y = 7y + 6 - y - 11y - 5y + 6 6 = 5y 6/5 = y 1 1/5 = y