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15n-10n+4=9
We simplify the equation to the form, which is simple to understand
15n-10n+4=9
We move all terms containing n to the left and all other terms to the right.
+15n-10n=+9-4
We simplify left and right side of the equation.
+5n=+5
We divide both sides of the equation by 5 to get n.
n=1
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