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21 = 3 + 4n + 5n can someone solve this but with showing work please??

21 = 3 + 4n + 5n can someone solve this but with showing work please??
asked 19.1k views
3 votes
21 = 3 + 4n + 5n can someone solve this but with showing work please??

asked
User Nullstellensatz
by
8.6k points

1 Answer

2 votes

21 = 3 + 4n + 5n

=> 21 - 3 = 4n + 5n

=> 18 = 4n + 5n

=> 18 = 9n

=> 18/9 = n

=> 2 = n

answered
User Brayan Pastor
by
8.3k points
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