15 3/8 : (2 3/4х+ 5 5/6) - 1 1/2= 3/4 (2,7y+3,08y):1,7-3,08=12,22 Вообщем, эти примеры,...

Решите задачу:

$15 \frac{3}{8}:(2 \frac{3}{4}x+5 \frac{5}{6})-1 \frac{1}{2}= \frac{3}{4} \\ \\ 15 \frac{3}{8}:(2 \frac{3}{4}x+5 \frac{5}{6})= \frac{3}{4}+ 1 \frac{1}{2} \\ \\ \frac{123}{8}:(2 \frac{3}{4}x+5 \frac{5}{6})= \frac{3}{4}+ \frac{6}{4} \\ \\ 2 \frac{3}{4}x+5 \frac{5}{6}= \frac{123}{8}:\frac{9}{4} \\ \\ 2 \frac{3}{4}x+5 \frac{5}{6}= \frac{123}{8}*\frac{4}{9} \\ \\ 2 \frac{3}{4}x+5 \frac{5}{6}= \frac{41}{6} \\ \\ 2 \frac{3}{4}x= 6\frac{5}{6}-5 \frac{5}{6} \\ \\ 2 \frac{3}{4}x= 1 \\ \\ \frac{11}{4}x= 1$
$\frac{11}{4}x= 1 \\ \\ x=1:\frac{11}{4} \\ \\ x=\frac{4}{11}$

$(2.7y+3.08y):1.7-3.08=12.22 \\ 5.78y:1.7=12.22+3.08 \\ 3.4y=15.3 \\ y=15.3:3.4 \\ y=4.5$