Answer
$4x + 6y -2z+ 5w -6$
Work Step by Step
Removing the parentheses and combining the like terms, we have
$$
(4x + 6y- 9) + (-2z+ 5w + 3)=4x + 6y- 9-2z+ 5w + 3
\\=4x + 6y -2z+ 5w -6
.$$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.