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n*2+n-42=0
We simplify the equation to the form, which is simple to understand
n*2+n-42=0
Simplifying:
+2n+n-42=0
We move all terms containing n to the left and all other terms to the right.
+2n+1n=0+42
We simplify left and right side of the equation.
+3n=+42
We divide both sides of the equation by 3 to get n.
n=14
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