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Trả lời:
\(\frac{2}{24}\cdot x=1\frac{5}{7}+46\frac{2}{6}\)
\(\frac{1}{12}\cdot x=\frac{12}{7}+\frac{139}{3}\)
\(\frac{1}{12}\cdot x=\frac{1009}{21}\)
\(x=\frac{1009}{21}:\frac{1}{12}\)
\(x=\frac{4036}{7}\)
Hc tốt #
\(\frac{2}{24}\cdot x=1\frac{5}{7}+46\frac{2}{6}\)
\(\frac{1}{12}\cdot x=\frac{12}{7}+\frac{139}{3}\)
\(\frac{1}{12}\cdot x=\frac{1009}{21}\)
\(x=\frac{1009}{21}:\frac{1}{12}\)
\(x=\frac{4036}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1}{5}+\frac{4}{10}+...+\frac{81}{45}=\frac{1}{5}+\frac{2}{5}+\frac{3}{5}+...+\frac{9}{5}=\frac{1+2+3+...+9}{5}=\frac{45}{5}=9\)
1/5 + 4/10 + 9/15 + 16/20 + 25/25 + 36/30 + 49/35 + 64/40 + 81/45
=1/5 + 2/5 + 3/5 + 4/5 + 5/5 + 6/5 + 7/5 + 8/5 + 9/5
=45/5 = 9
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 7/5 : x + 3/2 = 16/3
7/5 : x = 16/3 - 3/2
7/5 : x = 23/6
x = 7/5 : 23/6
x = 42/115
b, x : 1/5 + 1/7 = 3/5 . 18/21
x : 1/5 + 1/7 = 18/35
x : 1/5 = 18/35 - 1/7
x : 1/5 = 13/35
x = 13/35 . 1/5
x = 13/175
c, x - 1 và 1/3 : 2 = 5/7
x - 4/3 : 2 = 5/7
x - 4/3 = 5/7 . 2
x - 4/3 = 10/7
x = 10/7 + 4/3
x = 58/21
d, x + 2 và 3/5 . 1/6 = 35/36
x + 13/5 . 1/6 = 35/36
x + 13/5 = 35/36 : 1/6
x + 13/5 = 35/6
x = 35/6 - 13/5
x = 97/30
e, ( x + 3/2 ) : 2 = 7/10 + 1/5
( x + 3/2 ) : 2 = 9/10
x + 3/2 = 9/10 . 2
x + 3/2 = 9/5
x = 9/5 - 3/2
x = 3/10
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=66\frac{5}{12}+37+25\frac{1}{2}\)
\(\frac{797}{12}+\frac{444}{12}+\frac{51}{2}=\frac{1241}{12}+\frac{306}{12}=\frac{1547}{12}=128\frac{11}{12}\)
**** **** ****
\(66\frac{5}{12}+36\frac{12}{12}+25\frac{12}{24}=66\frac{5}{12}+36+1+25\frac{6}{12}=\left(66+37+25\right)+\left(\frac{5}{12}+\frac{6}{12}\right)=128+\frac{11}{12}=128\frac{11}{12}\)
\(\frac{46}{5}+\frac{36}{5}\)
\(=\frac{46+36}{5}=\frac{82}{5}\)
~~~!!!
\(\frac{46}{5}+\frac{36}{5}=\frac{46+36}{5}\)
\(=\frac{82}{5}\)
hok tốt