Question

Solve for n: 21k – 3n + 9p > 3p + 12.

n > 2p + 7k – 4
n < 2p + 7k – 4
n > –4p – 7k + 4
n < –4p – 7k + 4

Answer 1

\(\bf{21k – 3n + 9p > 3p + 12 \\ subtract~21k\\-3n+9p>3p-21k+12\\subtract~9p\\-3n=-6p-21k+12\\divide~by~-3 \\ n<2p+7k-4}\)

Answer 2

and when you divide/multiply by a negative, you always flip the sign