What process consists of a logical chain of steps that show that a statement must be true

What are the steps to solving the inequality 3b + 8 ≥ 14?

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up