Question

x+25%.x =125

Answer 1

*Bài làm:

\(x+25\%.x\) = \(125\)

⇒ \(x+\frac{25}{100}.x\) = \(125\)

⇒ \(x+\frac{1}{4}.x\) = \(125\)

⇒ \(x.\left(1+\frac{1}{4}\right)\) = \(125\)

⇒ \(x.\left(\frac{4}{4}+\frac{1}{4}\right)\) = \(125\)

⇒ \(x.\frac{5}{4}\) = \(125\)

⇒ \(x\) = \(125\) \(\div\) \(\frac{5}{4}\)

⇒ \(x\) = \(125\) \(.\) \(\frac{4}{5}\)

⇒ \(x\) = \(100\)

*Vậy: \(x\) = \(100\) .

➤ Chúc bạn học tốt!

Answer 2

\(x+20\%\cdot x=125\)

\(\Leftrightarrow x+\frac{1}{5}x=125\)

\(\Leftrightarrow\frac{6}{5}x=125\)

\(\Leftrightarrow x=\frac{625}{6}\)

Vậy....

Answer 3

\(x+25\%.x=125\)

=> \(x+\frac{1}{4}.x=125\)

=> \(\frac{5}{4}.x=125\)

=> \(x=125:\frac{5}{4}\)

=> \(x=100\)

Vậy \(x=100.\)

Chúc bạn học tốt!