\(x\cdot\frac{3+\frac{3}{20}+\frac{3}{13}+\frac{3}{2013}}{5+\frac{5}{20}+\frac{5}{13}+\frac{5}{2013}}=\frac{5}{3}\)
\(x\cdot\frac{3\cdot\left(1+\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}\right)}{5\cdot\left(1+\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}\right)}=\frac{5}{3}\)
\(x\cdot\frac{3}{5}=\frac{5}{3}\)
\(x=\frac{5}{3}:\frac{3}{5}\)
\(x=\frac{25}{9}\)
\(x.\frac{3+\frac{3}{20}+\frac{3}{13}+\frac{3}{2013}}{5+\frac{5}{20}+\frac{5}{13}+\frac{5}{2013}}=\frac{5}{3}\)
\(x.\frac{3.\left(1+\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}\right)}{5.\left(1+\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}\right)}=\frac{5}{3}\)
\(x.\frac{3}{5}=\frac{5}{3}\)
\(x=\frac{5}{3}:\frac{3}{5}\)
\(x=\frac{25}{9}\)
bạn skt ntt làm đúng rồi đấy bạn ơi
\(x.\frac{3+\frac{3}{20}+\frac{3}{13}+\frac{3}{2013}}{5+\frac{5}{20}+\frac{5}{13}+\frac{5}{2013}}=x.\frac{3\left(\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}+1\right)}{5\left(\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}+1\right)}=x.\frac{3}{5}\)\(\frac{3}{5}\)
thay vào ta có:\(x\frac{3}{5}=\frac{5}{3}\Rightarrow x=\frac{5}{3}:\frac{3}{5}=\frac{25}{9}\)
vậy.....
Vào lúc: 2017-06-17 18:02:05 Xem câu hỏi
$x.\frac{3+\frac{3}{20}+\frac{3}{13}+\frac{3}{2013}}{5+\frac{5}{20}+\frac{5}{13}+\frac{5}{2013}}=\frac{5}{3}$x.3+320 +313 +32013 5+520 +513 +52013 =53
$x.\frac{3.\left(1+\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}\right)}{5.\left(1+\frac{1}{20}+\frac{1}{13}+\frac{1}{2013}\right)}=\frac{5}{3}$x.3.(1+120 +113 +12013 )5.(1+120 +113 +12013 ) =53
$x.\frac{3}{5}=\frac{5}{3}$x.35 =53
$x=\frac{5}{3}:\frac{3}{5}$x=53 :35
k mình nha
~Chúc bạn học giỏi~
$x=\frac{25}{9}$
