(9+a)+9=

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Solution for (9+a)+9= equation:


Simplifying
(9 + a) + 9 = 0

Remove parenthesis around (9 + a)
9 + a + 9 = 0

Reorder the terms:
9 + 9 + a = 0

Combine like terms: 9 + 9 = 18
18 + a = 0

Solving
18 + a = 0

Solving for variable 'a'.

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

Add '-18' to each side of the equation.
18 + -18 + a = 0 + -18

Combine like terms: 18 + -18 = 0
0 + a = 0 + -18
a = 0 + -18

Combine like terms: 0 + -18 = -18
a = -18

Simplifying
a = -18

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