Question

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Answer 1

Ответ:

1) $\frac{7}{48}$ = a

2)$-\frac{3}{4}$ = b

3) $12.5$ = m

4) $4$ = c

Пошаговое объяснение:

1) 8.1 - 4.2 : a = -20.7

4.2 : a = 8.1 - (-20.7)

4.2 : a = 28.8

a = 4.2 : 28.8

a = $\frac{21}{5} : \frac{144}{5}$

a = $\frac{7}{48}$

2) $-\frac{3}{4}:b-2.6=-\frac{8}{5}$

$-\frac{3}{4}:b=2.6-\frac{8}{5}$

$-\frac{3}{4}:b=1$

$b=-\frac{3}{4}:1$

$b=-\frac{3}{4}$

3) $(7.75:3.1):m=-0.2:5\frac{3}{7}:\frac{7}{38}$

$(7.75:3.1):m=-\frac{1}{5}$

$2.5:m=-0.2$

$m=-(2.5:0.2)$

$m=12.5$

4) $(\frac{5}{6} :(-1\frac{1}{3} ):\frac{4}{5}:(-4\frac{11}{16})):c=-\frac{1}{24}$

$(-\frac{5}{8} :\frac{4}{5}:(-4\frac{11}{16})):c=-\frac{1}{24}$

$(-\frac{25}{32}:(-\frac{75}{16})):c=-\frac{1}{24}$

$\frac{1}{6}:c=-\frac{1}{24}$

$c=\frac{1}{6}:(-\frac{1}{24})$

$c=4$