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7/6 - 3/5 : 6
= 7/6 - 3/5 x 1/6
= 7/6 - 1/10
= 70/60 - 6/60
= 64/60
= 16/15
2/7 x 3 - y = 5/14
6/7 - y = 5/14
y = 6/7 - 5/14
y = 12/14 - 5/14
y = 7/14
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a) y = 5/14 : 6/7
y = 5/12
vậy y = 5/12
b) y = 4/9 x 2/3
y = 8/27
vậy t = 8/27
c) y = 1/2 - 3/10
y = 1/5
vậy y = 1/5
d) y = 5/6 - 1/3
y = 1/2
vậy y = 1/2
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a) y + 3/7 x 21/9 = 5
y + 3/7 x 7/3 = 5
y + 1 = 5
y = 4
b) y x 3/5 - 1/2 = 4/5
y x 3/5 = 4/5 + 1/2
y x 3/5 = 13/10
y = 13/6
c) 9/8 - y + 2/5 = 1/4
y - 2/5 = 9 /8 - 1/4
y - 2/5 = 7/8
y = 51/40
d) y - 6/5 : 2/3 = 5/6
y - 9/5 = 5/6
y = 79/30
e) y : 7/8 + 3/4 = 7/4
y : 7/8 = 1
y = 7/8
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a) đáp án là 15/14 hoặc 1 1/4
b) đáp án là 27/5 hoặc 5 2/5. Hok tốt!!:)
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\(a,\frac{42}{25}:\frac{y}{5}=\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}:\frac{6}{5}\)
\(\frac{y}{5}=\frac{42}{25}\times\frac{5}{6}\)
\(\frac{y}{5}=\frac{7}{5}\)
\(\Leftrightarrow5y=7.5\)
\(5y=35\)
\(y=7\)
![](https://rs.olm.vn/images/avt/0.png?1311)
7/5 -6/5:3=7/5-2/5=1
yx6/7 = 3/4+2
y x 6/7 =11/4
y = 11/4:6/7
y =77/24
Bài 1:
7/5 - 6/5 : 3
= 7/5 - 2/5
= 5/5 = 1.
Bài 2:
y x 6/7 = 3/4 + 2
y x 6/7 = 15/4
y = 15/4 : 6/7
y = 35/8.
K mình nha!
\(y\div\frac{6}{5}=\frac{7}{6}+2\)
\(y\div\frac{6}{5}=\frac{7}{6}+\frac{12}{6}\)
\(y\div\frac{6}{5}=\frac{19}{6}\)
\(y=\frac{19}{6}\times\frac{6}{5}\)
\(y=\frac{19}{5}\)