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n+n+1+n+2=72
We simplify the equation to the form, which is simple to understand
n+n+1+n+2=72
We move all terms containing n to the left and all other terms to the right.
+1n+1n+1n=+72-1-2
We simplify left and right side of the equation.
+3n=+69
We divide both sides of the equation by 3 to get n.
n=23
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