2.3-d=4.6
d=4.6-2.3
d=2.3
1 3/7-y=1/7
y=1 3/7-1/7
y=1 2/7
f-34.8=6.1
f=34.8+6.1
f=40.9
4.2-a=1.1
a=4.2- 1.1
а=3.1
2.3-d=4.6
d=4.6-2.3
d=2.3
1 3/7-y=1/7
y=1 3/7-1/7
y=1 2/7
f-34.8=6.1
f=34.8+6.1
f=40.9
4.2-a=1.1
a=4.2- 1.1
а=3.1