A single die is rolled. what is P(3)

If angle 2=3x +1 and angle 3=2x +4what is angle 2

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

How do you figure out which order to do two step equations in? like which thing do you subtract/add/multiply/divide first? i understand that you do the opposite of whatever's shown on the opposite side, but when?