Seven-eighths of a number is 63

The number is 72.

Step-by-step explanation:

Given:

Seven-eights of a number is 63.

To find the number.

Solution:

Let the unknown number be  =

By the given statement :

Thus, the equation to find the number can be given as:

Solving for .

Multiplying both sides by 8 to remove fractions.

Dividing both sides by 7.

7 will completely divide 7 and 63.

So, we have:

∴

Thus, the unknown number = 72

answer4 to the second power is 16

and 4 to the third power is 64,