21=37-4e

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Solution for 21=37-4e equation:


Simplifying
21 = 37 + -4e

Solving
21 = 37 + -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.
21 + 4e = 37 + -4e + 4e

Combine like terms: -4e + 4e = 0
21 + 4e = 37 + 0
21 + 4e = 37

Add '-21' to each side of the equation.
21 + -21 + 4e = 37 + -21

Combine like terms: 21 + -21 = 0
0 + 4e = 37 + -21
4e = 37 + -21

Combine like terms: 37 + -21 = 16
4e = 16

Divide each side by '4'.
e = 4

Simplifying
e = 4

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