Answer:
n = 21
Step-by-step explanation:
[tex]\frac{n}{2}-\frac{3n}{9}+\frac{5n}{9}=21\\\\\frac{9n}{18}-\frac{6n}{18}+\frac{10n}{18}=21\\\\\frac{3n}{18}+\frac{10n}{18}=21\\\\\frac{13n}{18}=21\\\\13n=273\\\\n=21[/tex]
Steps:
1. Write as fractions
2. Make the fractions have the same denominator
3. Collect like terms
4. Collect like terms
5. Multiply both sides by 18
6. Divide both sides by 13.
