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a: x=9/2-3/7=57/14
b: =>x=7/5x5/7=1
c: =>x=11/3:3/8=11/3x8/3=88/9
a : x = \(\dfrac{9}{2}\) - \(\dfrac{3}{7}\) = \(\dfrac{57}{14}\)
b : = > x = \(\dfrac{7}{5}\) x\(\dfrac{5}{7}\) = 1
c : = > \(\dfrac{11}{3}\) : \(\dfrac{3}{8}\) = \(\dfrac{11}{3}\) x \(\dfrac{8}{3}\) = \(\dfrac{88}{9}\)
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![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{3}{7}\times x=\dfrac{1}{3}\)
\(x=\dfrac{1}{3}:\dfrac{3}{7}\)
\(x=\dfrac{7}{9}\)
\(x:\dfrac{6}{8}=\dfrac{2}{5}\)
\(x=\dfrac{2}{5}\times\dfrac{6}{8}\)
\(x=\dfrac{6}{20}=\dfrac{3}{10}\)
\(x-\dfrac{2}{3}=\dfrac{5}{6}\)
\(x=\dfrac{5}{6}+\dfrac{2}{3}\)
\(x=\dfrac{9}{6}=\dfrac{3}{2}\)
\(x-\dfrac{2}{5}-\dfrac{4}{35}=\dfrac{1}{7}\)
\(x=\dfrac{1}{7}+\dfrac{4}{35}+\dfrac{2}{5}\)
\(x=\dfrac{23}{35}\)
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a)x : 2/5 = 3/7
= \(\dfrac{3}{7}x\dfrac{2}{5}=\dfrac{6}{35}\)
b) 6/5 - x = 7/8
\(x=\dfrac{6}{5}-\dfrac{7}{8}\)
\(x=\dfrac{13}{40}\)
a) x : 2/5 = 3/7
x = 3/7 x 2/5
x = 6/35
b) 6/5 - x = 7/8
x = 6/5 - 7/8
x = 13/40
#Tick cho mik nha
# học tốt :3
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a: x-4/5=3/7
=>x=3/7+4/5=43/35
b: x+3/7=4/5
=>x=4/5-3/7=13/35
c: 19/20-x=8/5-3/4
=>19/20-x=32/20-15/20=17/20
=>x=2/20=1/10
d: =>4/5*x=2/21
=>x=2/21:4/5=5/42
e: =>x:7/9=6/8
=>x=6/8*7/9=3/4*7/9=21/36=7/12
f: =>x/6=2/3-1/3=1/3
=>x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
a: x-4/5=3/7
=>x=3/7+4/5=43/35
b: x+3/7=4/5
=>x=4/5-3/7=13/35
c: 19/20-x=8/5-3/4
=>19/20-x=32/20-15/20=17/20
=>x=2/20=1/10
d: =>4/5*x=11/21
=>x=55/84
e: =>x=6/8*7/9=42/72=7/12
f: =>x/6=2/3-1/3=1/3
=>x=2
![](https://rs.olm.vn/images/avt/0.png?1311)
a: =>x-4/5=5/8
=>x=5/8+4/5=57/40
b: 7-x=5/12
=>x=7-5/12=79/12
a, x - \(\dfrac{3}{5}\) = \(\dfrac{5}{8}\) + \(\dfrac{1}{5}\)
x - \(\dfrac{3}{5}=\dfrac{33}{40}\)
x= \(\dfrac{33}{40}+\dfrac{3}{5}\)
x = \(\dfrac{57}{40}\)
b, 7 - x =\(\dfrac{5}{12}\)
x = 7 - \(\dfrac{5}{12}\)
x = \(\dfrac{79}{12}\)
`3/7+x=5/8`
`=>x=5/8-3/7`
`=>x=35/56-24/56`
`=>x=11/56`
\(\dfrac{3}{7}\) + x = \(\dfrac{5}{8}\)
x = \(\dfrac{5}{8}\) - \(\dfrac{3}{7}\)
x = \(\dfrac{11}{56}\)