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\(\frac{5}{16}+y=\frac{1}{2}\)
\(y=\frac{1}{2}+\frac{5}{16}\)
\(y=\frac{13}{16}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
`1-(12/5+y-8/9):16/9=0`
`=> (12/5+y-8/9):16/9=1-0`
`=> (12/5+y-8/9):16/9 =1`
`=> 12/5+y-8/9=1xx16/9`
`=> 12/5+y-8/9=16/9`
`=> 12/5+y=16/9+8/9`
`=> 12/5+y=8/3`
`=> y=8/3-12/5`
`=> y=4/15`
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a.16307:y=45\left(dư\text{ }17\right)\)\(\Leftrightarrow45\text{×}y+17=16307\)
\(45\text{×}y=16307-17\)
\(45\text{×}y=16290\)
\(y=16290:45\)
\(y=362\)
\(b.y\text{×}52+y\text{×}48=36700\)
\(y\text{×}\left(52+48\right)=36700\)
\(y\text{×}100=36700\)
\(y=36700:100\)
\(y=367\)
a) 16307= 45*y+17 -> y=(16307-17)/45= 362
b) y*(52+48)= 36700 -> y=36700/100= 367
1. Tính nhanh:
a, 1/1 * 2 + 1/2 * 3 + 1/3 * 4
b, 5/11 *16 + 5/16 * 21 + 5/21 * 26
c, 1/20 + 1/30 + 1/42
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 1/1 x 2 + 1/2 x 3 + 1/3 X 4 = 29/6
b) 5/11 x 16 + 5/16 x 21 + 5/21 x 26 = 74015/3696
c) 1/20 +1/30 + 1/42 = 3/28
nho k minh nha
![](https://rs.olm.vn/images/avt/0.png?1311)
\(1-\left(\frac{12}{5}+y=\frac{8}{9}\right):\frac{16}{9}=0\)
\(1-\left(\frac{12}{5}+y-\frac{8}{9}\right)=0\times\frac{16}{9}\)
\(1-\left(\frac{12}{5}+y-\frac{8}{9}\right)=0\)
\(\frac{12}{5}+y-\frac{8}{9}=1-0\)
\(\frac{12}{5}-y+\frac{8}{9}=1\)
\(\frac{12}{5}-y=1-\frac{8}{9}\)
\(\frac{12}{5}-y=\frac{1}{9}\)
\(y=\frac{12}{5}-\frac{1}{9}\)
\(y=\frac{108}{45}-\frac{5}{45}\)
\(y=\frac{103}{45}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)\(=\dfrac{16}{13}-\dfrac{3}{15}+\dfrac{6}{13}=\dfrac{22}{13}-\dfrac{3}{15}=\dfrac{96}{65}\)
b)\(=\dfrac{21}{8}-\left(\dfrac{5}{10}+\dfrac{6}{10}\right)=\dfrac{21}{8}-\dfrac{11}{10}=\dfrac{61}{40}\)
c)\(=\dfrac{27}{10}-3-\dfrac{4}{7}--\dfrac{61}{70}\)
TL
5/16+y=1/2
y=1/2-5/16
y=3/16
HT
TL:
\(\frac{5}{16}+y=\frac{1}{2}\)
\(y=\frac{1}{2}-\frac{5}{16}\)
\(y=\frac{8}{16}-\frac{5}{16}\)
\(y=\frac{3}{16}\)