Question

Помигите пожалуйста я немогу решить

Answer 1

1) х + 9/20 = 3/4
Х = 3/4 - 9/20 = 15/20 - 9/20
Х = 6/20
2) 25/36 - х = 5/18
х = 25/36 - 5/18 = 25/36 - 10/36
х = 15/36
3) х - 13/20 = 1/10
х = 13/20 + 1/10 = 13/20 + 2/20
х = 15/20 = 3/4