Question

Giúp mình với thanks

Answer 1

a) \(\dfrac{x-1}{x+5}=\dfrac{6}{7}\left(đk:x\ne-5\right)\)

\(\Rightarrow7\left(x-1\right)=6\left(x+5\right)\)

\(\Rightarrow x=37\left(tm\right)\)

b) \(\dfrac{x^2}{6}=\dfrac{24}{49}\)

\(\Rightarrow x^2=\dfrac{24.6}{49}=\dfrac{144}{49}\)

\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{12}{7}\\x=-\dfrac{12}{7}\end{matrix}\right.\)