X x3/5-1/2=4/5
dấu gạch chéo là phân số
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= 1/6 + 4/6 + 2/5
= 5/6 + 2/5
= 25/30 + 12/30
= 37/30
\(x-\frac{6}{5}\div\frac{2}{3}=\frac{5}{6}\)
\(\Leftrightarrow x-\frac{18}{10}=\frac{5}{6}\)
\(\Leftrightarrow x=\frac{5}{6}+\frac{18}{10}\)
\(\Leftrightarrow x=\frac{25}{30}+\frac{54}{30}\)
\(\Leftrightarrow x=\frac{79}{30}\)
`x-10/3=7/18+3/5`
`=> x-10/3=89/90`
`=> x=89/90+10/3`
`=> x=389/90`
Ta có: x:7/8+3/4=7/4
-> x:7/8=7/4-3/4
->x:7/8=1
->x=1*7/8
->x=7/8
Vậy x=7/8
\(x+\frac{3}{7}\times\frac{21}{9}=5\)
\(\Rightarrow x+\frac{3}{7}\times\frac{7}{3}=5\)
\(\Rightarrow x+1=5\)
\(\Rightarrow x=5-1=4\)
\(\dfrac{1}{2}-\dfrac{1}{2}\left(3-2x\right)=0\)
\(\Rightarrow\dfrac{1}{2}\left[1-\left(3-2x\right)\right]=0\)
\(\Rightarrow\dfrac{1}{2}\left[1-3+2x\right]=0\)
\(\Rightarrow\dfrac{1}{2}\left[2x-2\right]=0\)
\(\Rightarrow2x-2=0\Rightarrow2x=2\Rightarrow x=1\)
\(x\times\frac{3}{5}-\frac{1}{2}=\frac{4}{5}\)
\(\Rightarrow x\times\frac{6}{10}-\frac{5}{10}=\frac{4}{5}\)
\(\Rightarrow x\times\frac{1}{10}=\frac{4}{5}\)
\(\Rightarrow x=\frac{4}{5}:\frac{1}{10}\)
\(\Rightarrow x=\frac{4}{5}\cdot\frac{10}{1}\)
\(\Rightarrow x=\frac{40}{5}=8\)
Vậy x = 8
\(x\times\frac{3}{5}-\frac{1}{2}=\frac{4}{5}\)
\(x\times\frac{3}{5}=\frac{4}{5}+\frac{1}{2}\)
\(x\times\frac{3}{5}=\frac{13}{10}\)
\(x=\frac{13}{10}:\frac{3}{5}\)
\(x=\frac{13}{6}\)