4 - (1 3/4х + 1 1/2) = 10 9/10 + 2 1/4х
4 - (1,75х + 1,5) = 10,9 + 2,25х
4 - 1,75х - 1,5 = 10,9 + 2,25х
- 1,75х - 2,25х = - 4 + 1,5 + 10,9
- 4х = 8,4
х = - 2,1
---------------------------------------------------
8/25у = 3 1/5
8/25у = 16/5
у = 16/5 : 8/25
у = 10
---------------------------------------------------
3 1/12 - 1 5/6п = 1 17/24
37/12 - 11/6п = 41/24
11/6п = 37/12 - 41/24
44/24п = 74/24 - 41/24
44/24п = 33/24
п = 33/24 : 44/24
п = 3/4
-----------------------------------------------------
(7/12 + 11/30х) : 7 1/4 = 1/3 + 2 1/3х
7/12 + 11/30х = 29/4 * (1/3 + 7/3х)
7/12 + 11/30х = 29/12 + 203/12х
11/30х - 203/12х = 29/12 - 7/12
22/60х - 1015/60х = 22/12
- 993/60х = 22/12
х = - 110/993