Three times an unknown number decreased by five times the unknown number

Hello!

This can be written as an expression

3 times an unknown number is 3x

5 times the unknown number is 5x

It says decreased which is subtraction

3x - 5x = -2x

The answer is -2 times the unknown number

Hope this helps!

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.