### Home > CC3 > Chapter 1 > Lesson 1.1.3 > Problem 1-20

1-20.

Solve the problem below by defining a variable and then writing an equation. If you find this too challenging, then use the 5-D Process described in this lesson’s Math Notes box to help you get started. State your solution in a sentence.

Jabari is thinking of three numbers. The greatest number is twice as large as the least number. The middle number is three more than the least number. The sum of the three numbers is

Rewrite the word problem as an equation or a system of equations.

Let the least number equal .

Make a guess for what could be. Was your answer higher or lower than