1) х + 9/20 = 3/4
х = 3/4 - 9/20
х = 15/20 - 9/20
х = 6/20
х = 3/10
ответ: 3/10.
2) 25/36 - х = 5/18
х = 25/36 - 5/18
х = 25/36 - 10/36
х = 15/36
х = 5/12
ответ: 5/12.
3) х - 13/20 = 1/10
х = 1/10 + 13/20
х = 2/20 + 13/20
х = 15/20
х = 3/4
ответ: 3/4.
1) х + 9/20 = 3/4
х = 3/4 - 9/20
х = 15/20 - 9/20
х = 6/20
х = 3/10
ответ: 3/10.
2) 25/36 - х = 5/18
х = 25/36 - 5/18
х = 25/36 - 10/36
х = 15/36
х = 5/12
ответ: 5/12.
3) х - 13/20 = 1/10
х = 1/10 + 13/20
х = 2/20 + 13/20
х = 15/20
х = 3/4
ответ: 3/4.