Đáp án + Giải thích các bước giải:
a, $\frac{16}{5}$ . x = $\frac{4}{5}$ . $\frac{3}{10}$
-> $\frac{16}{5}$ . x = $\frac{6}{25}$
-> x = $\frac{6}{25}$ : $\frac{16}{5}$
-> x = $\frac{3}{40}$
Vậy...
b, $\frac{1}{20}$ - ( x- $\frac{8}{5}$) = $\frac{1}{10}$
-> x- $\frac{8}{5}$ = $\frac{1}{20}$ - $\frac{1}{10}$
-> x- $\frac{8}{5}$ = $\frac{-1}{20}$
-> x = $\frac{-1}{20}$ + $\frac{8}{5}$
-> x = $\frac{31}{20}$
Vậy ...
c, $\frac{1}{3}$ - x= $\frac{5}{6}$ - $\frac{1}{4}$
-> $\frac{1}{3}$ - x = $\frac{7}{12}$
-> x = $\frac{1}{3}$- $\frac{7}{12}$
-> x = $\frac{-1}{4}$
Vậy...
d, $\frac{1}{3}$-( x-$\frac{3}{25}$)= $\frac{1}{50}$
-> x-$\frac{3}{25}$ = $\frac{1}{3}$ - $\frac{1}{50}$
-> x-$\frac{3}{25}$ = $\frac{47}{150}$
-> x = $\frac{47}{150}$ + $\frac{3}{25}$
-> x = $\frac{13}{30}$
Vậy...
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