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6n-42=4n
We simplify the equation to the form, which is simple to understand
6n-42=4n
We move all terms containing n to the left and all other terms to the right.
+6n-4n=0+42
We simplify left and right side of the equation.
+2n=+42
We divide both sides of the equation by 2 to get n.
n=21
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