Sisters

Sisters Susan Helen and Vera have saved for a new bike. Susan save € 90, Helen save € 90 and Vera save € 82. Missing 30% gave them their mother. What is the price of the bike?

Final Answer:

x =  374.29 Eur

Step-by-step explanation:

$$\begin{gathered} s=90+90+82=262\text{eur} \\ r=30\%=\frac{30}{100}=\frac{3}{10}=0.3 \\ s+r\cdot x=x \\ 262+0.3\cdot x=x \\ 0.7x=262 \\ x=\frac{262}{0.7}=374.28571429 \\ x=\frac{2620}{7}\doteq 374.285714=374.29\text{Eur} \end{gathered}$$

Try another example