3e-9=12

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Solution for 3e-9=12 equation: 


Simplifying
3e + -9 = 12

Reorder the terms:
-9 + 3e = 12

Solving
-9 + 3e = 12

Solving for variable 'e'.

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

Add '9' to each side of the equation.
-9 + 9 + 3e = 12 + 9

Combine like terms: -9 + 9 = 0
0 + 3e = 12 + 9
3e = 12 + 9

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

Divide each side by '3'.
e = 7

Simplifying
e = 7

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