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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.

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How can you check your answer?

(3x + 18) – x = 4

2x + 18 = 4

2x = −14

x = −7