e+9=12

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Solution for e+9=12 equation: 


Simplifying
e + 9 = 12

Reorder the terms:
9 + e = 12

Solving
9 + e = 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 + e = 12 + -9

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

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

Simplifying
e = 3

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