a+9a=-100

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Solution for a+9a=-100 equation: 


Simplifying
a + 9a = -100

Combine like terms: a + 9a = 10a
10a = -100

Solving
10a = -100

Solving for variable 'a'.

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

Divide each side by '10'.
a = -10

Simplifying
a = -10

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