when you multiply or divide both sides by a negative in an inequality, flip the sign
I will show 2 ways, 1 with multipy and one with add
1. multiply
divide both sides by -12 and flips sign
r>2
2. add
add 12r to both sides
0<12r-24
add 24 to both sides
24<12r
divide both sides by 12
2<r
r>2
