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22+x/49= 5/7
=> (22+x) x 5= 49 x 5
=> 110+5x=245
=> 5x= 135
=> x=27
\(\frac{22+x}{49}=\frac{5}{7}\)
\(\Rightarrow7\times\left(22+x\right)=5\times49\)
\(\Rightarrow154+7x=245\)
\(\Rightarrow7x=245-154\)
\(\Rightarrow7x=91\)
\(\Rightarrow x=13\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(22+\frac{x}{49}=\frac{5}{7}\)
=>\(\frac{x}{49}=\frac{5}{7}-22\)
\(\Rightarrow\frac{x}{49}=-\frac{149}{7}\)
\(\Rightarrow x=-\frac{149}{7}\cdot49\)
\(\Rightarrow x=-1043\)
22 + \(\frac{X}{49}\)= \(\frac{5}{7}\)
\(\frac{X}{49}\)= 22 - \(\frac{5}{7}\)= \(\frac{149}{7}\)
X = \(\frac{149}{7}\)X 49
X = 1043
![](https://rs.olm.vn/images/avt/0.png?1311)
\(2-\left(\frac{37}{7}+x-3\right)x\frac{49}{11}=0\)
\(\left(\frac{37}{7}+x-3\right)x\frac{49}{11}=2\)
\(\frac{37}{7}+x-3=\frac{22}{49}\)
\(x=-\frac{90}{49}\)
\(2-\left(\frac{37}{7}+x-3\right)\cdot\frac{49}{11}=0\)
\(\left(\frac{37}{7}+x-3\right)\cdot\frac{49}{11}=0+2\)
\(\left(\frac{37}{7}+x-3\right)\cdot\frac{49}{11}=2\)
\(\frac{37}{7}+x-3=2:\frac{49}{11}\)
\(\frac{37}{7}+x-3=\frac{22}{49}\)
\(\frac{37}{7}+x=\frac{22}{49}+3\)
\(\frac{37}{7}+x=\frac{169}{49}\)
\(x=\frac{169}{49}-\frac{37}{7}\)
\(x=-\frac{90}{49}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
ta có : 49:7*5=35 , 35-22= 13 vậy x = 13 bạn nhé
h minh nhe
![](https://rs.olm.vn/images/avt/0.png?1311)
25/49 x 21/29 - 25/49 x 7/29 + 24/29
= 25/49 x ( 21/ 29 - 7/29 ) + 24/49
= 25/49 x 14/29 + 24/29
= 350/1421 + 24/29
= 350/1421 + 1176/1421
= 1526/1421
\(\frac{25}{49}\times\frac{21}{29}-\frac{25}{49}\times\frac{7}{29}+\frac{24}{49}\)
\(=\frac{25\times\left(21-7\right)}{49\times29}+\frac{24}{49}\)
\(\frac{50}{7\times29}+\frac{24}{49}=\frac{2450+4872}{7\times29\times49}=\frac{7322}{7\times29\times49}=\frac{1046}{1421}\)
Ta thấy 49 gấp 7 lần 7 nên phần tử số phải là 35
Vậy x= 35-22
x= 13
tk nhé mình k bạn rồi
Ta thấy 49 gấp 7 lần 7 nên phần tử số là 35
Vậy x= 35-22
x= 13
tk nhé