7e+12=21+4e

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Solution for 7e+12=21+4e equation:


Simplifying
7e + 12 = 21 + 4e

Reorder the terms:
12 + 7e = 21 + 4e

Solving
12 + 7e = 21 + 4e

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Add '-4e' to each side of the equation.
12 + 7e + -4e = 21 + 4e + -4e

Combine like terms: 7e + -4e = 3e
12 + 3e = 21 + 4e + -4e

Combine like terms: 4e + -4e = 0
12 + 3e = 21 + 0
12 + 3e = 21

Add '-12' to each side of the equation.
12 + -12 + 3e = 21 + -12

Combine like terms: 12 + -12 = 0
0 + 3e = 21 + -12
3e = 21 + -12

Combine like terms: 21 + -12 = 9
3e = 9

Divide each side by '3'.
e = 3

Simplifying
e = 3

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