Answer
Both are correct.
Work Step by Step
Subtraction can be restated as addition by changing the sign of the number being subtracted.
$x-6=x+(-6)$
Therefore, the two equations are equivalent, and both are correct.
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 1 - Foundations for Algebra - 1-9 Patterns, Equations, and Graphs - Practice and Problem-Solving Exercises - Page 66: 38
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