add 7 to both sides :
21E + 7 -7 = 0+7
21E = 7
divide both sides by 21
21E / 21 = 7/21
E = 1/3
:D
need help to solve this problem:
21E − 7 = 0
what is e?
1 answer
21E − 7 = 0
what is e?
1 answer