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Choose the prime factors of 36
- 2 x 3 x 6
- 1 x 36
- 2 x 2 x 9
- 2 x 2 x 3 x 3
1. \(\dfrac{x}{15}< \dfrac{4}{15}\)
<=> \(x< 4\) (x \(\ne0\))
2. \(\dfrac{5}{9}>\dfrac{x}{9}\)
<=> \(5>x\) (x \(\ne0\))
3. \(1< \dfrac{x}{8}< \dfrac{11}{8}\)
<=> \(\dfrac{8}{8}< \dfrac{x}{8}< \dfrac{11}{8}\)
<=> 8 < x < 11
<=> x \(\in\left\{9;10\right\}\)
\(x:\dfrac{4}{7}=\dfrac{6}{7}-\dfrac{1}{3}\\ \Rightarrow x:\dfrac{4}{7}=\dfrac{18}{21}-\dfrac{7}{21}\\ \Rightarrow x:\dfrac{4}{7}=\dfrac{11}{21}\\ \Rightarrow x=\dfrac{11}{21}\times\dfrac{4}{7}\\ \Rightarrow x=\dfrac{44}{147}\)
57/12 > 114/x > 57/13
<=> 114/24 > 114/x > 114/26
x = 25
1. What is Mai's address?
2. Who does she live with?
3. Is her house beautiful?
4. It is Nguyen Trai Street.
5. Where does she live?
6. Danang City is his hometown.
7. What is his hometown like?
8. It is a small and quiet village.
9. Do you live with your parents?
10. There're modern towers in my town .
\(9\left(x-6\right)=3x\)
\(9x-54=3x\)
\(9x-3x-54=0\)
\(6x=54\)
\(x=9\)