### Home > CC3 > Chapter 4 > Lesson 4.1.4 > Problem 4-40

4-40.

I am thinking of a number. When I double my number and then subtract the result from five, I get negative one. What is my number? Write and solve an equation.

Assign the number a variable.

Example: The number

Put the words into an equation.

When I double my number.

Then subtract the result from five.

I get negative one.

Solve for .