Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
giá trị của x thỏa mãn 1,25:0,8 = 3/8 : 0,2x là.........
25/16=3/8 :0,2x
3/8 : 25/16 =0,2x
6/25=0,2x
6/25 : 0,2 = x
6/5 = x
\(0,2x=\frac{2,1}{3}\)
\(\Rightarrow x=\frac{2,1}{3}:0,2\)
\(\Rightarrow x=\frac{7}{2}=3,5\)
a) \(1,25:0,8=\frac{3}{8}:0,2x\)
\(\Rightarrow\frac{3}{8}:0,2x=\frac{25}{16}\)
\(\Rightarrow0,2x=\frac{3}{8}:\frac{25}{16}=\frac{6}{25}\)
\(\Rightarrow x=\frac{6}{25}:\frac{1}{5}=\frac{6}{5}\)
b) \(1,8:1,3=\left(-2,7\right):5x\)
\(\Rightarrow\frac{-27}{10}:5x=\frac{18}{13}\)
\(\Rightarrow5x=\frac{-27}{10}:\frac{18}{13}=\frac{-39}{20}\)
\(\Rightarrow x=\frac{-39}{100}\)
a, \(2,5:4x=0,5:0,2\)
\(\Rightarrow4x=\dfrac{2,5.0,2}{0,5}\)
\(\Rightarrow4x=1\Rightarrow x=\dfrac{1}{4}\)
b, \(\dfrac{1}{5}x:3=\dfrac{2}{3}:0,5\)
\(\Rightarrow\dfrac{1}{5}x=\dfrac{3.\dfrac{2}{3}}{0,5}\)
\(\Rightarrow\dfrac{1}{5}x=4\Rightarrow x=20\)
c, \(1,25:0,8=\dfrac{3}{8}:0,2x\)
\(\Rightarrow0,2x=\dfrac{0,8.\dfrac{3}{8}}{1,25}\)
\(\Rightarrow0,2x=0,24\Rightarrow x=1,2\)
Chúc bạn học tốt!!
a, \(2,5:4x=0,5:0,2\)
\(2,5:4x=2,5\)
\(4x=2,5:2,5\)
\(4x=1\)
\(x=1:4\)
\(x=\dfrac{1}{4}\)
Vậy .............
b, \(\dfrac{1}{5}x:3=\dfrac{2}{3}\)
\(\dfrac{1}{5}x=\dfrac{2}{3}.3\)
\(\dfrac{1}{5}x=2\)
\(x=2:\dfrac{1}{5}\)
\(x=10\)
Vậy .....
c, \(1,25:0,8=\dfrac{3}{8}:0,2x\)
\(1,5625=\dfrac{3}{8}:0,2x\)
\(0,2x=\dfrac{3}{8}:1,5625\)
\(0,2x=0,24\)
\(x=0,24:0,2\)
\(x=1,2\)
Vậy ...
\(-\frac{17}{21}:\left(\frac{5}{4}-\frac{2}{5}\right)< x+\frac{4}{7}< 1-\frac{1}{2}+\frac{1}{3}-\frac{1}{4}\)
\(\Leftrightarrow-\frac{17}{21}:\frac{17}{20}< x+\frac{4}{7}< \frac{12}{12}-\frac{6}{12}+\frac{4}{12}-\frac{3}{12}\)
\(\Leftrightarrow-\frac{17}{21}.\frac{20}{17}< x+\frac{4}{7}< \frac{7}{12}\)
\(\Leftrightarrow-\frac{20}{21}< x+\frac{4}{7}< \frac{7}{12}\)
\(\Leftrightarrow-\frac{20}{21}< x< \frac{1}{84}\)
\(\Leftrightarrow-\frac{80}{84}< x< \frac{1}{84}\)
\(\Leftrightarrow-80< x< 1\Leftrightarrow x\in\left\{-79;-78;...;0\right\}\)
mà để Giá trị nguyên lớn nhất của x
\(\Rightarrow x=-1\)
25/16=3/8:0,2x
3/8:25/16=0,2x
6/25=0,2x
6/25:0,2=x
6/5=x