?
If 50 is subtracted from two-third of number, the result is equal to sum of 40 and one-fourth of that number. What is the number ?
Answer & Solution
Correct Answer:
Option
B
Let the number be x
Then,
$$\eqalign{ & \Leftrightarrow \frac{2}{3}x - 50 = \frac{1}{4}x + 40 \cr & \Leftrightarrow \frac{2}{3}x - \frac{1}{4}x = 90 \cr & \Leftrightarrow \frac{{5x}}{{12}} = 90 \cr & \Leftrightarrow x = \left( {\frac{{90 \times 12}}{5}} \right) \cr & \Leftrightarrow x = 216 \cr} $$
Then,
$$\eqalign{ & \Leftrightarrow \frac{2}{3}x - 50 = \frac{1}{4}x + 40 \cr & \Leftrightarrow \frac{2}{3}x - \frac{1}{4}x = 90 \cr & \Leftrightarrow \frac{{5x}}{{12}} = 90 \cr & \Leftrightarrow x = \left( {\frac{{90 \times 12}}{5}} \right) \cr & \Leftrightarrow x = 216 \cr} $$
Join the Discussion
Login to post a comment or share your explanation.
Login