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Ncatnow · Answer 1 · 2022-05-31T12:25:03+0000

-6n + 21 = 12n - 15

(Add 6n to both sides.)

21 = 18n -15

(Add 15 to both sides.)

36 = 18n

(Divide both sides by 18.)

2 = n

So, n = 2. Remember that to solve, you must always do the same thing to BOTH sides of the equation.

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