Question

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

Answer 1

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