Question

12.50+0.40e=14.75+0.25e

Answer 1

12.50+0.40e=14.75+0.25e

-12.50             -12.50        Subtract 12.50 to elimanate on the right side to isolate e

0.40e=2.25+0.25e          left from subtracting 12/50

-0.25            -0.25e           subtract 0.25e to put e on one side.

0.15e=2.25                         left from subtracting 0.25 e

0.15e/0.15=2.25/0.15          divide to isolate e and to get you're answer

e=15

Hope it helps!