Answer
x=14
Work Step by Step
Set the product of the means equal to the product of the extremes and solve for the variable.
$18\times7=x \times9$
$126=9x$
$126\div9=9x\div9$
$14=x$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 7 - Section 7.2 - Proportion - Exercises - Page 277: 20
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