A)M-5/12m= 1/4 (Б) 5/16:z=3/4 (В) 1 1/9m + 5/6 = 1 1/2 (Г) 8/15y - 3/10y + 3/5y = 1/2

Решите задачу:

$1) m- \frac{5}{12}m= \frac{1}{4}, \\ \frac{7}{12}m= \frac{1}{4}, \\ m= \frac{1}{4}:\frac{7}{12}, \\ m=\frac{1}{4}\cdot \frac{12}{7}, \\ m=\frac{3}{7} .\\ 2) \frac{5}{16}:z= \frac{3}{4} , \\ z= \frac{5}{16}: \frac{3}{4}, \\ z= \frac{5}{16}\cdot \frac{4}{3}, \\z= \frac{5}{12}.$
$3)1 \frac{1}{9}m+ \frac{5}{6}= 1 \frac{1}{2} \\ 1 \frac{1}{9}m= 1 \frac{1}{2} - \frac{5}{6}\\ \frac{10}{9}m= \frac{3}{2} - \frac{5}{6}\\ \frac{10}{9}m= \frac{9}{6} - \frac{5}{6}\\\frac{10}{9}m= \frac{4}{6} \\ m= \frac{4}{6}: \frac{10}{9} \\ m= \frac{4}{6}\cdot \frac{9}{10} \\ m=0,6$
$4)\frac{8}{15}y - \frac{3}{10}y + \frac{3}{5}y =\frac{1}{2} \\ \frac{16}{30}y - \frac{9}{30}y + \frac{18}{30}y =\frac{15}{30} \\ \frac{25}{30}y =\frac{15}{30} \\ 25y=15 \\ 5y=3 \\ y= \frac{3}{5} \\ y=0,6$