9a-1=27

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Solution for 9a-1=27 equation: 


Simplifying
9a + -1 = 27

Reorder the terms:
-1 + 9a = 27

Solving
-1 + 9a = 27

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 + 9a = 27 + 1

Combine like terms: -1 + 1 = 0
0 + 9a = 27 + 1
9a = 27 + 1

Combine like terms: 27 + 1 = 28
9a = 28

Divide each side by '9'.
a = 3.111111111

Simplifying
a = 3.111111111

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