Question

Tìm X;

\(\frac{x+3}{x+11}=\frac{3}{5}\)

Answer 1

pt <=> \(5.\left(x+3\right)=3.\left(x+11\right)\) 

<=> 5x +15 = 3x + 33 

<=> 2x = 18 

<=> x = 9 

vậy pt đã cho có nghiệm x = 9 

 

Answer 2

\(\frac{x+3}{x+11}=\frac{3}{5}\)

\(\Rightarrow5.\left(x+3\right)=3.\left(x+11\right)\)

\(\Rightarrow5x+15=3x+33\)

\(\Rightarrow5x-3x=33-15\)

\(\Rightarrow2x=18\)

\(\Rightarrow x=9\)

Vậy x=9