Question

\(\dfrac{x + 11}{14 - x} = \dfrac{2}{3}\)

Answer 1

\(\dfrac{x+11}{14-x}=\dfrac{2}{3}\)

\(\Rightarrow3\left(x+11\right)=2\left(14-x\right)\)

\(\Rightarrow3x+33=28-2x\)

\(\Rightarrow5x=-5\Rightarrow x=-1\)

Answer 2

(14 - x)2 = (x + 11)3

28 - 2x = 3x + 33

28 - 2x - 3x - 33 = 0

- 5 - 5x = 0

x = -1

Answer 3

\(\dfrac{x+11}{14-x}=\dfrac{2}{3}\\ \Leftrightarrow3\left(x+11\right)=2\left(14-x\right)\\ \Leftrightarrow3x+33=28-2x\\ \Leftrightarrow3x+2x=28-33\\ \Leftrightarrow5x=-5\Leftrightarrow x=-1\\ Vậyx=-1\)