Пошаговое объяснение:
7/10x-1/4x+1/5x=1 19/30
14/20x - 5/20x + 4/20x = 1 19/30
13/20x = 1 19/30
x = 1 19/30 : 13/20
x = 49/30 * 20/13
x = 98/39
x = 2 20/39
Пошаговое объяснение:
7/10x-1/4x+1/5x=1 19/30
14/20x - 5/20x + 4/20x = 1 19/30
13/20x = 1 19/30
x = 1 19/30 : 13/20
x = 49/30 * 20/13
x = 98/39
x = 2 20/39