-10a+9a=12

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Solution for -10a+9a=12 equation: 


Simplifying
-10a + 9a = 12

Combine like terms: -10a + 9a = -1a
-1a = 12

Solving
-1a = 12

Solving for variable 'a'.

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

Divide each side by '-1'.
a = -12

Simplifying
a = -12

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