# 20 multiplied by a number, decreased by 15 equals 25. How do you find the number?

##### 1 Answer

Jan 13, 2017

See full explanation for finding the number below

#### Explanation:

To solve this world problem we will convert it to a math problem to solve one phrase at a time.

"by a number" - let's call the number

"20 multiplied by a number" or by

"decreased by" means to subtract what follows which in this case is "15" so we can expand what we are writing to:

"equals 25" is the same as

We can now solve: