15 3/8 :(2 3/4 х+5 5/8)-1 1/2=3/4
15 3/8:(2 3/4 х+5 5/8)=3/4+1 1/2
15 3/8:(2 3/4 х+5 5/8)=3/4+1 2/4
15 3/8:(2 3/4 х+5 5/8)=2 1/4
2 3/4 х+5 5/8=15 3/8:2 1/4
2 3/4 х+5 5/8=123/8 * 4/9=123/18
2 3/4 х=6 5/6 - 5 5/8
2 3/4 х=6 20/24 - 5 15/24
2 3/4 х=1 5/24
х=1 5/24 : 2 3/4
х=29/24 * 4/11
х=29/66