
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.


Bài làm
\(c=\frac{3}{9}x\frac{2}{8}\)
\(c=\frac{1}{3}x\frac{1}{4}\)
\(c=\frac{1}{12}\)

\(\frac{4}{6}\)+ y =\(\frac{7}{5}\)
y = \(\frac{7}{5}\)- \(\frac{2}{3}\)
y = \(\frac{21}{15}\)-\(\frac{10}{15}\)
y = \(\frac{11}{15}\)
k cho mk nha



\(\frac{1}{7}< \frac{x}{13}< \frac{2}{7}\)
\(\frac{1\times13}{7\times13}< \frac{x\times7}{13\times7}< \frac{2\times13}{7\times13}\)
\(\frac{13}{91}< \frac{x7}{91}< \frac{26}{91}\)
\(\Rightarrow13< x7< 26\)
Vì \(x7⋮7\) mà \(13< x7< 26\Rightarrow x7=14;21\)
\(\Rightarrow x=14\div7=2\)
\(x=21\div7=3\)

99/17=135/255
9/16=135/240
15/a=135/9a
=>240 =< 9a =< 255
=>9a=243 hoặc 9a=252
=>a=27 hoặc a=28
vậy a=27 hoặc a=28

\(\frac{9}{15}< \frac{12}{...}< \frac{9}{14}\)
\(\frac{108}{180}< \frac{108}{x}< \frac{108}{168}\)
x = 171 => số thích hợp đề điền vào ô trống là 19
5/7 + c = 9/5
<=> c = 9/5 - 5/7
<=> c = 38/35
Vậy :...............