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n-7.8=12.5
We simplify the equation to the form, which is simple to understand
n-7.8=12.5
We move all terms containing n to the left and all other terms to the right.
+1n=+12.5+7.8
We simplify left and right side of the equation.
+1n=+20.3
We divide both sides of the equation by 1 to get n.
n=20.3
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