Answer
$z=7$
Work Step by Step
$14=5z-21$
$5z-21=14$
First add 21 to both sides.
$5z=14+21$
$5z=35$
Then divide both sides by 5.
5z$\div$5=35$\div$5
$z=7$
Check the answer.
14=5(7)-21
14=35-21
14=14
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