Simplify both sides of the equation.
3/5n + 15 = 2/5n + 10
Subtract 2/5n from both sides.
3/5n + 15 - 2/5n = 2/5n + 10 - 2/5n15n + 15 = 10
Subtract 15 from both sides.
1/5n + 15 - 15 = 10 - 151/5n = -5
Multiply both sides by 5.
5 × (1/5n) = (5) × (−5)n = -25
Answer: n is -25.