Question

\(\dfrac{x+3}{-4}=\dfrac{1-x}{5}\)

Giúp mik với ạ

Answer 1

\(\dfrac{x+3}{-4}=\dfrac{1-x}{5}\)

\(\Rightarrow5\left(x+3\right)=-4\left(1-x\right)\)

\(\Leftrightarrow5x+15=-4+4x\)

\(\Leftrightarrow5x-4x=-4-15\)

\(\Leftrightarrow x=-19\)

Vậy \(x=-19\).

Answer 2

  

Answer 3

\(\dfrac{x+3}{-4}=\dfrac{1-x}{5}\\ \Rightarrow5\left(x+3\right)=-4\left(1-x\right)\\ \Rightarrow5x+15=-4+4x\\ \Rightarrow5x+15+4-4x=0\\ \Rightarrow19+x=0\\ \Rightarrow x=-19\)