2/7 \(\times\) x = 2/3 x \(\div\) 7/11 = 22
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31 tháng 12 2022
a: =>x*2/15=2/7
=>x=2/7:2/15=2/7*15/2=15/7
b: x=3:7/5=15/7
c: x=-1/2:4/9=-1/2*9/4=-9/8
d: x=-8/3:3/8=-64/9
g: =>4/11x=2/5+1/3=6/15+5/15=11/15
=>x=11/15:4/11=121/60
l: =>1/4:x=1-3/2=-1/2
=>x=-1/4:1/2=-1/4*2=-1/2
k: =>x:7=-1/3+5/2=-2/6+15/6=13/6
=>x=91/6
27 tháng 4 2019
\(x-40\%x=3,6\)
\(\Rightarrow100\%x-40\%x=3,6\)
\(\Rightarrow60\%x=3,6\)
\(\Rightarrow\frac{60}{100}x=3,6\)
\(\Rightarrow x=6\)
27 tháng 4 2019
\(3\frac{2}{7}x-\frac{1}{3}=-2\frac{3}{4}\)
\(\Rightarrow\frac{23}{7}x-\frac{1}{3}=-\frac{11}{4}\)
\(\Rightarrow\frac{23}{7}x=-\frac{33}{12}+\frac{4}{12}\)
\(\Rightarrow\frac{23}{7}x=\frac{29}{12}\)
\(\Rightarrow x=\frac{29}{12}:\frac{23}{7}=\frac{203}{276}\)
PT
6
Q
29 tháng 3 2022
a) 2/7 X x = 2/3
X = 2/3 : 2/7
X = 7/3
b) 2/5 : x = 1/3
X = 2/5 : 1/3
X = 6/5
c) x : 7/11 = 22
X = 22 x 7/11
X = 14
d) 1/2 : x = 5
X = 1/2 : 5
X = 1/10
O
29 tháng 3 2022
a) \(\dfrac{2}{7}\times x=\dfrac{2}{3}\)
\(x=\dfrac{2}{3}\div\dfrac{2}{7}\)
\(x=\dfrac{7}{3}\)
b) \(\dfrac{2}{5}:x=\dfrac{1}{3}\)
\(x=\dfrac{2}{5}:\dfrac{1}{3}\)
\(x=\dfrac{6}{5}\)
c) \(x:\dfrac{7}{11}=22\)
\(x=22\times\dfrac{7}{11}\)
\(x=\dfrac{154}{11}\)
\(x=14\)
d) \(\dfrac{1}{2}:x=5\)
\(x=\dfrac{1}{2}:5\)
\(x=\dfrac{1}{10}\)
MH
26 tháng 1 2022
\(A=\dfrac{-19}{9}.\dfrac{1}{2}-\dfrac{4}{11}.\dfrac{-11}{9}+\left(-\dfrac{2}{3}\right)=-\dfrac{23}{18}\)
\(B=\left(-\dfrac{15}{6}\right):\dfrac{-1}{2}+\dfrac{7}{-12}-\dfrac{1}{3}.\dfrac{-11}{2}=\dfrac{25}{4}\)
\(C=\dfrac{3}{4}.\left(-8\right)-\dfrac{1}{3}.\dfrac{-7}{2}-\dfrac{5}{18}=-\dfrac{46}{9}\)
26 tháng 1 2022
\(A=\dfrac{-19}{18}+\dfrac{4}{9}-\dfrac{2}{3}=\dfrac{-19}{18}+\dfrac{8}{18}-\dfrac{12}{18}=\dfrac{-23}{18}\)
\(B=\dfrac{-5}{2}\cdot\dfrac{-2}{1}-\dfrac{7}{12}+\dfrac{11}{6}=\dfrac{5\cdot12-7+22}{12}=\dfrac{75}{12}=\dfrac{25}{4}\)
TK
3
BA
21 tháng 9 2019
\(\frac{7}{22}:\frac{3}{11}+\frac{7}{22}:\frac{4}{11}\)
\(=\frac{7}{22}:\left(\frac{3}{11}+\frac{4}{11}\right)\)
\(=\frac{7}{22}:\frac{7}{11}\)
\(=\frac{1}{2}\)
ti ck nha
21 tháng 9 2019
\(\frac{7}{22}\) : (\(\frac{3}{11}\) + \(\frac{4}{11}\) )
\(\frac{7}{22}\) : \(\frac{7}{11}\) =\(\frac{7}{22}\) x \(\frac{11}{7}\) = 2
PB
0
13 tháng 8 2019
a) \(\frac{3}{5}.x-\frac{1}{5}=\frac{4}{5}\)
\(\Leftrightarrow\frac{3}{5}.x=\frac{4}{5}+\frac{1}{5}\)
\(\Leftrightarrow\frac{3}{5}.x=1\)
\(\Leftrightarrow x=1:\frac{3}{5}\)
\(\Leftrightarrow x=\frac{5}{3}\)
Vậy : \(x=\frac{5}{3}\)
b) \(\frac{4}{7}+\frac{5}{7}:x=1\)
\(\Leftrightarrow\frac{5}{7}:x=1-\frac{4}{7}\)
\(\Leftrightarrow\frac{5}{7}:x=\frac{3}{7}\)
\(\Leftrightarrow x=\frac{5}{7}:\frac{3}{7}\)
\(\Leftrightarrow x=\frac{5}{3}\)
Vậy : \(x=\frac{5}{3}\)
c) \(-\frac{12}{7}.\left(\frac{3}{4}-x\right).\frac{1}{4}=-1\)
\(\Leftrightarrow\frac{-12.1}{7.4}.\left(\frac{3}{4}-x\right)=-1\)
\(\Leftrightarrow-\frac{3}{7}.\left(\frac{3}{4}-x\right)=-1\)
\(\Leftrightarrow\frac{3}{4}-x=-1:\left(-\frac{3}{7}\right)\)
\(\Leftrightarrow\frac{3}{4}-x=\frac{7}{3}\)
\(\Leftrightarrow x=\frac{3}{4}-\frac{7}{3}=-\frac{19}{12}\)
Vậy : \(x=-\frac{19}{12}\)
d) \(x:\frac{17}{8}=-\frac{2}{5}.-\frac{9}{17}+3\)
\(\Leftrightarrow x:\frac{17}{8}=\frac{273}{85}\)
\(\Leftrightarrow x=\frac{273}{85}.\frac{17}{8}\)
\(\Leftrightarrow x=\frac{273}{40}\)
Vậy : \(x=\frac{273}{40}\)
\(\)
2/7 x X= 2/3
x = 2/3 : 2/7
x = 7/3
x : 7/11 = 22
x = 22 x 7/11
x= 14
a,x=2/3:2/7
x=7/3
b,x=22.7/11
x=14