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First you need to add 12 to both sides of the equation.
6n - 12 + 12 = 2.4 + 12
6n = 14.4 -Now divide both sides by 6.
6n / 6 = 14.4 / 6
n = 2.4
Work of solving equation:
6n-12=2.4
6n=14.4
n=2.4
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