Question

Solve for t. 3t -12 < -3 and -6t <12

Answer 1

3t-12<-3
add 12 both sides
3t<9
divide both sides by 3
t<3

-6t<12
divide both sides by -6, don't forget to flip sign since multiplying/dividing by a negative
t>-2

Answer 2

3t-12<-3
3t<-3+12
3t< 9
t< 3

-6t<12
t>-2
Sign changes when multiplying with minus both sides