Question

задание
2/9+x=7/9
6/11-x=4/11
x-3/7=2/7
4/15+6/15=
27/28-25/28=

Answer 1

2/9+х=7/9
х=7/9-2/9
х=5/9

Answer 2

х=5/7

Answer 3

4/15+6/15

Answer 4

=10/15=2/3

Answer 5

27/28-25/28=2/28+1/14

Answer 6

2/28=1/14*