Answer
Add 7 to each side.
Work Step by Step
To solve an inequality, you need to isolate the variable on one side of the inequality.
$1\lt d-7\longrightarrow$ add 7 to each side
$1+7\lt d-7+7\longrightarrow$ add
$8\lt d$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 3 - Solving Inequalities - 3-2 Solving Inequalities Using Addition or Subtraction - Practice and Problem-Solving Exercises - Page 174: 10
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