a-2+3=12

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Solution for a-2+3=12 equation: 


Simplifying
a + -2 + 3 = 12

Reorder the terms:
-2 + 3 + a = 12

Combine like terms: -2 + 3 = 1
1 + a = 12

Solving
1 + a = 12

Solving for variable 'a'.

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

Add '-1' to each side of the equation.
1 + -1 + a = 12 + -1

Combine like terms: 1 + -1 = 0
0 + a = 12 + -1
a = 12 + -1

Combine like terms: 12 + -1 = 11
a = 11

Simplifying
a = 11

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