a) \(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)
\(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{35}{8}\)
\(\Rightarrow\frac{1}{3}.x=\frac{35}{8}.\frac{2}{3}\)
\(\Rightarrow\frac{1}{3}.x=\frac{35}{12}\)
\(\Rightarrow x=\frac{35}{12}:\frac{1}{3}\)
\(\Rightarrow x=\frac{35}{4}\)
Vậy \(x=\frac{35}{4}\)
\(a.\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)
\(\left(\frac{1}{3}.x\right):\frac{2}{3}=\frac{35}{8}\)
\(\left(\frac{1}{3}.x\right)=\frac{35}{8}.\frac{2}{3}\)
\(\left(\frac{1}{3}.x\right)=\frac{35}{12}\)
\(x=\frac{35}{12}:\frac{1}{3}\)
\(x=\frac{35}{4}\)
\(b.4,5:0,3=2,25:\left(0,1.x\right)\)
\(\Rightarrow2,25:\left(0,1.x\right)=4,5:0,3\)
\(2,25:\left(0,1.x\right)=15\)
\(2,25:\left(0,1.x\right)=2,25:15\)
\(\left(0,1.x\right)=0,15\)
\(x=0,15:0,1\)
\(x=1,5\)
\(c.8:\left(\frac{1}{4}.x\right)=2:0,02\)
\(8:\left(\frac{1}{4}.x\right)=100\)
\(\left(\frac{1}{4}.x\right)=8:100\)
\(\left(\frac{1}{4}.x\right)=\frac{2}{25}\)
\(x=\frac{2}{25}:\frac{1}{4}\)
\(x=\frac{8}{25}\)
\(d.3:\frac{9}{4}=\frac{3}{4}:\left(6.x\right)\)
\(\Rightarrow\frac{3}{4}:\left(6.x\right)=3:\frac{9}{4}\)
\(\frac{3}{4}:\left(6.x\right)=\frac{4}{3}\)
\(\left(6.x\right)=\frac{3}{4}:\frac{4}{3}\)
\(\left(6.x\right)=\frac{9}{16}\)
\(x=\frac{9}{16}:6\)
\(x=\frac{3}{32}\)
^...^ ^_^
a) \(\left(\frac{1}{3}x\right):\frac{2}{3}=\frac{7}{4}:\frac{2}{5}\)
\(\left(\frac{1}{3}x\right):\frac{2}{3}=\frac{35}{8}\)
\(\left(\frac{1}{3}x\right)=\frac{35}{12}\)
\(x=\frac{35}{4}\)
b) \(4,5:0,3=2,25:\left(0,1x\right)\)
\(15=2,25:\left(0,1x\right)\)
\(0,1x=\frac{3}{20}\)
\(x=1,5\)
c) \(8:\left(\frac{1}{4}x\right)=2:0,02\)
\(8:\left(\frac{1}{4}x\right)=100\)
\(\left(\frac{1}{4}x\right)=0,08\)
\(x=0,32\)
d) \(3:\frac{9}{4}=\frac{3}{4}:\left(6x\right)\)
\(\frac{4}{3}=\frac{3}{4}:\left(6x\right)\)
\(6x=\frac{9}{16}\)
\(x=\frac{3}{32}\)
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