Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - Chapter 1 Review Problem Set: 61

Answer

$22$

Work Step by Step

Substituting $a= -1 $ and $b= 5 $, the given expression, $ 5a+6b-7a-2b ,$ evaluates to \begin{array}{l}\require{cancel} 5(-1)+6(5)-7(-1)-2(5) \\\\= -5+30+7-10 \\\\= 25+7-10 \\\\= 32-10 \\\\= 22 .\end{array}
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