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3n+.50n=42
We simplify the equation to the form, which is simple to understand
3n+.50n=42
We move all terms containing n to the left and all other terms to the right.
+3n + 0.5n=+42
We simplify left and right side of the equation.
+3.5n=+42
We divide both sides of the equation by 3.5 to get n.
n=12
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