Answer
$84$
Work Step by Step
Substituting $8$ into $x$ and $10$ to $y$:
$3(2y+x)
\\=3(2\cdot 10 + 8)$
Simplify within the parentheses. Perform the multiplication first and addition next:
$\\=3(20+8)
\\=3(28)$
Multiply.
$\\=84$
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Review Exercises - Page 108: 4
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