Cost and profit

Find the cost price of an article which was sold for 90.00 at a profit of 20 percent.

Correct answer:

x =  75

Step-by-step explanation:

$$\begin{gathered} p=20\mathrm{\%}=1+{\displaystyle \frac{20}{100}}=1.2 \\ p\cdot x=90.00 \\ 1.2\cdot x=90.00 \\ 1.2x=90 \\ x=75 \end{gathered}$$

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