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1 vote
Use an equation to solve the problem.

The difference between a number and 4 times that number is -21. What is the number?

2 Answers

3 votes
We'll call the number 'x' for now.

So the difference between x and 4 times x (4x) is -21.

x - 4x = -21

-3x = -21

x = -21 / -3

x = 7.

The number is 7.
User Shootfast
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5 votes
n being the number, n-4=-21. n=-17
User Yrll
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8.2k points

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