Question

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

Trình bày cách giải luôn nhé!

Answer 1

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

\(\Rightarrow4.\left(3-x\right)=5\)

\(\Rightarrow12-4x=5\)

\(\Rightarrow4x=12-5\)

\(\Rightarrow4x=7\)

\(\Rightarrow x=\frac{7}{4}\)

Vậy x = \(\frac{7}{4}\)

Answer 2

\(\frac{7}{4}\)

Answer 3

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

\(\Rightarrow\left(3-x\right)\cdot4=5\cdot1\)

\(\Rightarrow12-4x=5\)

\(\Rightarrow4x=12-5\)

\(\Rightarrow4x=7\)

\(\Rightarrow x=7:4\)

\(\Rightarrow x=\frac{7}{4}\)

Vậy \(x=\frac{7}{4}\)