#### Answer

b. 10 - x

#### Work Step by Step

If we know that the sum of two numbers is 10, we can subtract one number from 10 to find the other number. Since one number is x, the expression for the other number is 10 - x.

Published by
Pearson

ISBN 10:
0321726391

ISBN 13:
978-0-32172-639-1

b. 10 - x

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