-1+a-9a=

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Solution for -1+a-9a= equation: 


Simplifying
-1 + a + -9a = 0

Combine like terms: a + -9a = -8a
-1 + -8a = 0

Solving
-1 + -8a = 0

Solving for variable 'a'.

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

Add '1' to each side of the equation.
-1 + 1 + -8a = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -8a = 0 + 1
-8a = 0 + 1

Combine like terms: 0 + 1 = 1
-8a = 1

Divide each side by '-8'.
a = -0.125

Simplifying
a = -0.125

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