Answer
$x+11$
Work Step by Step
To remove parentheses preceded by a minus sign, change the sign of all the terms within the parentheses.
To combine like terms, add the coefficients.
$(2x+4)-(x-7)=2x+4-x+7=(2+(-1))x+(4+7)=x+11$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Section 5.2 - Simplifying Algebraic Expressions - Exercise - Page 218: 50
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