Question

tìm x biết : x+9/2=5-x/5

Answer 1

<=> x + x/5 = 5 - 9/2

<=> 6/5x = 1/2

<=> x = 5/12 

Answer 2

\(x+\frac{9}{2}=5-\frac{x}{5}\)

\(x+\frac{x}{5}=5-\frac{9}{2}\)

\(x\left(1+\frac{1}{5}\right)=\frac{10}{2}-\frac{9}{2}\)

\(x\cdot\left(\frac{5}{5}+\frac{1}{5}\right)=\frac{1}{2}\)

\(x\cdot\frac{6}{5}=\frac{1}{2}\)

\(x=\frac{1}{2}:\frac{6}{5}\)

\(x=\frac{5}{12}\)

Answer 3

\(x+\frac{9}{2}=5-\frac{x}{5}\)

\(x=5-\frac{9}{2}-\frac{x}{5}\)

\(x=\frac{1}{2}-\frac{x}{5}\)

\(\frac{1}{2}=x-\frac{x}{5}=\frac{4x}{5}\)

\(\frac{5}{10}=\frac{8x}{10}\)

\(=>x=\frac{5}{8}\)