Answer
$x=y+6$
When the output is $4$, the input is $10$.
Work Step by Step
$y=x-6$
$y+6=x-6+6$ or
$x=y+6$
When $y=4$,
$x=4+6=10$.
That is, when the output is $4$, the input is $10$.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 10 - Radical Functions and Equations - 10.4 - Inverse of a Function - Monitoring Progress - Page 569: 3
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