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n*4=12+n
We simplify the equation to the form, which is simple to understand
n*4=12+n
We move all terms containing n to the left and all other terms to the right.
+4n-1n=+12
We simplify left and right side of the equation.
+3n=+12
We divide both sides of the equation by 3 to get n.
n=4
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