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Verified Answer :

(n+1)8=32
n+1=32/8
n=4-1
n=3

remmeber you can do anything to an equaiton as long as you do it to both sides
 
first divide both sides by 8

(n+1)(8/8)=32/8
(n+1)
(1)=4
n+1=4
minus 1 from both sides
n+1-1=4-1
n+0=3
n=3