* \(\frac{1+2a}{18}\) = \(\frac{1+4a}{24}\)
\(\Rightarrow\) 24(1+2a) = 18(1+4a)
\(\Rightarrow\) 24+48a = 18+72a
\(\Rightarrow\) 48a - 72a = 18 - 24
\(\Rightarrow\) -24a = -6
\(\Rightarrow\) a = -6:(-24)
\(\Rightarrow\) a = \(\frac{1}{4}\)
* Thay a = \(\frac{1}{4}\) vào \(\frac{1+4a}{24}\) = \(\frac{1+6a}{6x}\)
\(\Rightarrow\) \(\frac{1+4.\frac{1}{4}}{24}\) = \(\frac{1+6.\frac{1}{4}}{6x}\)
\(\Rightarrow\) \(\frac{1}{12}\) = \(\frac{\frac{5}{2}}{6x}\)
\(\Rightarrow\) 6x = 12.\(\frac{5}{2}\)
\(\Rightarrow\) 6x = 30
\(\Rightarrow\) x = 30:6
\(\Rightarrow\) x = 5
Vậy x = 5
Tham khảo câu mình làm rồi nhé:
Chúc bạn học tốt!
