1) x+8/15=1 3/4
х= 7/4-8/15
х= 73/60
2) 1 1/8 - x = 13/16
х= 9/8-13/16
х= 5/16
3)x-7 1/2 = 3 3/4
х= 7,5+0,75
х= 8,25
4) 2,8 - x = 3/4
х= 2,8-0,75
х= 2,05
1) x+8/15=1 3/4
х= 7/4-8/15
х= 73/60
2) 1 1/8 - x = 13/16
х= 9/8-13/16
х= 5/16
3)x-7 1/2 = 3 3/4
х= 7,5+0,75
х= 8,25
4) 2,8 - x = 3/4
х= 2,8-0,75
х= 2,05