### Home > CAAC > Chapter 4 > Lesson 4.2.4 > Problem 4-101

4-101.

Kathy is thinking of a number. When she triples her number, adds eighteen, and then subtracts her original number from the sum, she gets four. What is Kathy's original number? Homework Help ✎

Start by writing an equation for the word problem.

Solve the equation for *x*.

Did you show all of your work?

How can you check your answer?

(3*x* + 18) – *x* = 4

2*x* + 18 = 4

2*x* = −14

*x* = −7