Answer
$r=3$
Work Step by Step
$r-2[1-3(2r+4)]=61$
We distribute:
$r-2(1-6r-12)=61$
And simplify:
$r-2(-6r-11)=61$
And distribute again:
$r+12r+22=61$
And combine $r$ terms:
$13r=39$
And solve for $r$:
$r=3$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter P, Prerequisites - Section P.8 - Solving Basic Equations - P.8 Exercises - Page 60: 32
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