(1-3/5)*х=4/25
х = 4/25 : (1-3/5)
х = 4/25 - 4/25*5/3
х = 4/25 - 4/5 * 1/3
х = 4/25 - 4/15
х = 24/150 - 40/150 = - 16/150
По-другому:
х - 3/5х = 4/25
- 2/5х = 4/25
х = 4/25 * 5/2 = 2/5
х = -2/5
ответ: -2/5
(1-3/5)*х=4/25
х = 4/25 : (1-3/5)
х = 4/25 - 4/25*5/3
х = 4/25 - 4/5 * 1/3
х = 4/25 - 4/15
х = 24/150 - 40/150 = - 16/150
По-другому:
(1-3/5)*х=4/25
х - 3/5х = 4/25
- 2/5х = 4/25
х = 4/25 * 5/2 = 2/5
х = -2/5
ответ: -2/5