Question

Номер 146(а,б).............

Answer 1

146а) х = (4/15) / (2/5) =(4*5) / (15*2) = 2/3
146б) у = ((5/6 ) - (3/4)) / (2/15) = ((10/12)-9/12)) / (2/15) =
= (1/12)*(15/2) = 5/8

Answer 2

А) $\frac{4}{15}$ : x =  $\frac{2}{5}$

$\frac{2}{5}$ * x = $\frac{4}{15}$

x = $\frac{4}{15}$ : $\frac{2}{5}$

x = $\frac{4}{15}$ * $\frac{5}{2}$

x = $\frac{2}{3}$

б) $\frac{2}{15}$y + $\frac{3}{4}$ = $\frac{5}{6}$

$\frac{2}{15}$y = $\frac{5}{6}$ - $\frac{3}{4}$

$\frac{2}{15}$ * y = $\frac{10-9}{12}$ = $\frac{1}{12}$

y = $\frac{1}{12}$ : $\frac{2}{15}$

y = $\frac{1}{12}$ * $\frac{15}{2}$

y = $\frac{5}{8}$