Question

Write the following phrase as a variable expression. Use x to represent the number.21 less than the product of three and a number

Answer 1

The phrase "the product of three and a number" can be written as 3 times x or just 3x.

Now, "21 less than the product ..." can be written as 3x - 21.

Hence, the phrase "21 less than the product of three and a number" can be written as 3x - 21.