\(\frac{2}{a}\cdot\frac{3}{7}\cdot\frac{1}{5}=\frac{6}{35}\)
\(\frac{2\cdot3\cdot1}{a\cdot7\cdot5}=\frac{6}{35}\)
\(\Rightarrow\frac{6}{a\cdot35}=\frac{6}{35}\)
\(\Rightarrow a\cdot35=35\)
\(a=35:35=1\)
P/s: Ủa rồi tìm x hay tìm a vậy bạn :D???
2/a x 3 / 7 x 1 / 5 = 6 / 35
2 / a x 3 / 7 = 6 / 35 : 1 / 5
2 / a x 3 / 7 = 6 / 7
2 / a = 6 / 7 : 3 / 7
2 / a = 2
= > a = 1
Học tốt
-NGL
\(\frac{2}{a}\times\frac{3}{7}\times\frac{1}{5}=\frac{6}{35}\)
\(\frac{2}{a}\times\frac{3}{35}=\frac{6}{35}\)
\(\frac{2}{a}=\frac{6}{35}:\frac{3}{35}\)
\(\frac{2}{a}=2\)
\(\Rightarrow a=1\)
HOK TOT
\(\frac{2}{a}\cdot\frac{3}{7}\cdot\frac{1}{5}=\frac{6}{35}\)
\(\frac{2}{a}\cdot\frac{3}{35}=\frac{6}{35}\)
\(\frac{2}{a}=\frac{6}{35}:\frac{3}{35}\)
\(\frac{2}{a}=\frac{6}{35}\cdot\frac{35}{3}\)
\(\frac{2}{a}=\frac{6}{3}\)
\(\frac{2}{a}=2\)
\(a=2:2=1\)
Hok tốt
-Ken-
.Đề bài đúng là tìm a nha bạn !
\(\frac{2}{a}\) \(.\) \(\frac{3}{7}\) \(.\) \(\frac{1}{5}\) \(=\) \(\frac{6}{35}\)
6 = ( 3 x 2 x 1 ) : 1 \(\Rightarrow\) 35 = ( a x 7 x 5 ) : 1.
\(\Rightarrow\) a = ( 35 x 1 ) : 7 : 5 = 1.
Vậy a = 1.