(a+12)-9=4

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Solution for (a+12)-9=4 equation:


Simplifying
(a + 12) + -9 = 4

Reorder the terms:
(12 + a) + -9 = 4

Remove parenthesis around (12 + a)
12 + a + -9 = 4

Reorder the terms:
12 + -9 + a = 4

Combine like terms: 12 + -9 = 3
3 + a = 4

Solving
3 + a = 4

Solving for variable 'a'.

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

Add '-3' to each side of the equation.
3 + -3 + a = 4 + -3

Combine like terms: 3 + -3 = 0
0 + a = 4 + -3
a = 4 + -3

Combine like terms: 4 + -3 = 1
a = 1

Simplifying
a = 1

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