x/7=x+16/35
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\(\frac{x}{7}=\frac{x+16}{35}\)
\(\Leftrightarrow x\cdot35=7\left(x+16\right)\)
\(\Leftrightarrow35x=7x+112\)
\(\Leftrightarrow35x-7x=112\)
\(\Leftrightarrow28x=112\)
\(\Leftrightarrow x=4\)
Vậy x = 4
\(\frac{8}{x}=\frac{7}{x-16}\)
\(\Leftrightarrow8\left(x-16\right)=x\cdot7\)
\(\Leftrightarrow8x-128=7x\)
\(\Leftrightarrow8x-7x=128\)
\(\Leftrightarrow x=128\)
Vậy x = 128
a,\(\frac{x}{7}=\frac{x+16}{35}< =>\frac{5x}{35}=\frac{x+16}{35}\)
\(< =>5x=x+16\)
\(< =>4x=16< =>x=4\)
b,\(\frac{8}{x}=\frac{7}{x-16}\)\(< =>8x-128=7x\)
\(< =>x=128\)
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Lời giải:
$\frac{18}{35}\times \frac{5}{16}-\frac{5}{16}\times \frac{2}{7}$
$=\frac{5}{16}\times (\frac{18}{35}-\frac{2}{7})$
$=\frac{5}{16}\times \frac{8}{35}=\frac{1}{14}$
![](https://rs.olm.vn/images/avt/0.png?1311)
=>16/35=x-x/7
=>16/35=7x-x/7
6x/7=16/35
=>30x/35=16/35
=>30x=16
x=8/15
Ai h mk mk se h lai
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{x}{7}=\frac{\left(x+16\right)}{35}\)
\(\Rightarrow\) 35x = 7.( x + 16 )
\(\Leftrightarrow\) 35x = 7x + 112
\(\Leftrightarrow\) 28x = 112
\(\Leftrightarrow\) x = 4
Vậy x = 4
\(\frac{x}{7}=\frac{\left(x+16\right)}{35}\)
--> 35.x = 7.(x+16)
--> 35.x = 7.x + 112
--> 28.x = 112
--> x = 4
Vậy x = 4
~ Học tốt ~
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{x}{7}=\frac{x+16}{35}\)
\(\frac{5\times x}{5\times7}=\frac{x+16}{35}\)
\(\frac{5\times x}{35}=\frac{x+16}{35}\)
\(\Rightarrow5\times x-x=16\)
\(4\times x=16\)
\(x=16:4\)
\(x=4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 7 x 5 = 35 7 x 6 = 42 7 x 8 = 56 7 x 4 = 28
35 : 7 = 5 42 : 7 = 6 56 : 7 = 8 28 : 7 = 4
b) 42 : 7 = 6 35 : 7 = 5 63 : 7 = 9 16 : 2 = 8
14 : 7 = 2 49 : 7 = 7 7 : 7 = 1 48 : 6 = 8
28 : 7 = 4 70 : =10 21 : 7 = 3 56 : 7 = 8
![](https://rs.olm.vn/images/avt/0.png?1311)
x/7 = x + 16/35
x/7 - x = 16/35
(1/7 - 1)x = 16/35
-6/7x = 16/35
x = 16/35 : -6/7
x = -8/15
\(\frac{x}{7}=x+\frac{16}{35}\)
\(\frac{x}{7}-x=\frac{16}{35}\)chuyển vế
\(\frac{x}{7}-\frac{x}{1}=\frac{16}{35}\)
\(\frac{x5}{35}-\frac{35x}{35}=\frac{16}{35}\)
\(\Rightarrow x.5-35.x=16\)
\(\Rightarrow x.\left(5-35\right)=16\)
\(\Rightarrow x.\left(-30\right)=16\)
\(\Rightarrow x=16:\left(-30\right)\)
\(\Rightarrow x=-\frac{8}{15}\)
\(\Leftrightarrow x-\frac{x}{7}+\frac{16}{35}=0\)
\(\Leftrightarrow x\left(1-\frac{1}{7}\right)+\frac{16}{35}=0\)
\(\Leftrightarrow x.\frac{6}{7}=-\frac{16}{35}\)
\(\Leftrightarrow x=-\frac{16}{35}:\frac{6}{7}\)
\(\Leftrightarrow x=-\frac{8}{15}\)