8/25 у=3 1/5
у=16/5 : 8/25
у= 16/5 * 25/8
у=10
3 1/12 - 1 5/6 n=1 17/24
1 5/6 n=3 2/24 - 1 17/24
1 5/6 n=1 9/24
n= 33/24 : 11/6
n=33/24 * 6/11
n=3/4
(7/12+11/30 x) :7 1/4=1/3
7/12+11/30 x=1/3 * 29/4
7/12+11/30 x=29/12
11/30 x=29/12 - 7/12
11/30 x=22/12=11/6
x=11/6 : 11/30
x=11/6 * 30/11
x=5
1/9 z+7/18 z - 11/27 z=2 1/2
6/54 z+21/54 z - 22/54 z=2 1/2
5/54 z=5/2
z=5/2 : 5/54
z=5/2 * 54/5
z=27
a - 13/18 a=1/3
5/18 z=1/3
z=1/3 : 5/18
z=1/3 * 18/5
z=6/5=1 1/5
x - 2/5=3/7 - 8/35
x=15/35 - 8/35 +14/35
x=21/35=3/5
8 - x=3 7/9
x=8 - 3 7/9
x=4 2/9
4*(1 3/4 x+1 1/2)=10.9
7x+6=10.9
7x=10.9-6
7x=4.9 :7
x=0.7
(3 1/2 x - 1/4)*8=3
28x - 2=3
28x=5
x=5/28