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n+7-3n=15-3n
We simplify the equation to the form, which is simple to understand
n+7-3n=15-3n
We move all terms containing n to the left and all other terms to the right.
+1n-3n+3n=+15-7
We simplify left and right side of the equation.
+1n=+8
We divide both sides of the equation by 1 to get n.
n=8
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