Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 2 - Solving Equations - 2-7 Solving Proportions - Practice and Problem-Solving Exercises - Page 127: 33



Work Step by Step

$\frac{c+1}{c-2}=\frac{4}{7}$ cross multiply $7(c+1)=4(c-2)$ distributive property $7c+7=4c-8$ subtract 4c from both sides; subtract 7 from both sides $7c+7-4c-7=4c-8-4c-7$ combine like terms $3c=-15$ divide both sides by 3 $3c\div3=-15\div3$ simplify $c=-5$
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