2 câu trả lời
$\dfrac{3}{5}$ : x = $\dfrac{4}{7}$
x = $\dfrac{3}{5}$ : $\dfrac{4}{7}$
x = $\dfrac{3}{5}$ x $\dfrac{7}{4}$
x = $\dfrac{21}{20}$
Vậy x = $\dfrac{21}{20}$
$\dfrac{3}{8}$ : $\dfrac{x}{8}$ = $\dfrac{1}{2}$
$\dfrac{x}{8}$ = $\dfrac{3}{8}$ : $\dfrac{1}{2}$
$\dfrac{x}{8}$ = $\dfrac{3}{8}$ x 2
$\dfrac{x}{8}$ = $\dfrac{6}{8}$
=> x = 6
Vậy x = 6.
Đáp án:
Giải thích các bước giải:
a)$\frac{3}{5}$:x= $\frac{4}{7}$
x=$\frac{3}{5}$:$\frac{4}{7}$
x=$\frac{21}{20}$
b)$\frac{3}{8}$:$\frac{x}{8}$=$\frac{1}{2}$
$\frac{x}{8}$=$\frac{3}{8}$:$\frac{1}{2}$
$\frac{x}{8}$=$\frac{3}{4}$
$\frac{x}{8}$=$\frac{6}{8}$
x=6
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