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Alright First you combine the like terms.
9n - 3n = 6n
21 - 24 = -3
Rewrite the simplified equation
6n - 3 = 0
Solve for n
6n = 3
n = 3/6
n = 1/2
Ask if you need more help! :)
717/3= 239
Divide 717 by 3 to get the price of one night.
Opposite conjugate.
(-1/3) is (3/1)
