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 = $frac{5}{8}$