do I times by 2 once I get the answer

Question

A regular lightbulb uses 20 watts less than twice the power of an energy-saver lightbulb. If the regular bulb uses 170 watts, how much does the energy-saver bulb use?

Answer 1

R=2•E-20=170

E=95

Answer 2

r = 2e - 20            170 = 2e -20  Add 20 to both sides.         190 = 2e       190/2 = 2e/2         95 watts = e