a+10+9=

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Solution for a+10+9= equation: 


Simplifying
a + 10 + 9 = 0

Reorder the terms:
10 + 9 + a = 0

Combine like terms: 10 + 9 = 19
19 + a = 0

Solving
19 + a = 0

Solving for variable 'a'.

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

Add '-19' to each side of the equation.
19 + -19 + a = 0 + -19

Combine like terms: 19 + -19 = 0
0 + a = 0 + -19
a = 0 + -19

Combine like terms: 0 + -19 = -19
a = -19

Simplifying
a = -19

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