Question

I need help with my algebra homework. Please explain how to get the answers.
Part A. Solve -np-90<30 for n
Part B. Solve 5m-3h=45 for h

Answer 1

A: -np-90<30
add 90 to both sides to get -np alone: -np<120
then divide by p: -n<120/p
then multiply both sides by -1 (so you can get n not -n): n>120/p note that the less than sign changed direction. When ever you change the sign of both sides the inequality changes direction. This is just a rule.
B:-5m-3h=45
move 5m with addition: -3h=45+3m
then divide by -3: h = -(45+3m)/3

Answer 2

Thank you