9a-9=11a

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Solution for 9a-9=11a equation:


Simplifying
9a + -9 = 11a

Reorder the terms:
-9 + 9a = 11a

Solving
-9 + 9a = 11a

Solving for variable 'a'.

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

Add '-11a' to each side of the equation.
-9 + 9a + -11a = 11a + -11a

Combine like terms: 9a + -11a = -2a
-9 + -2a = 11a + -11a

Combine like terms: 11a + -11a = 0
-9 + -2a = 0

Add '9' to each side of the equation.
-9 + 9 + -2a = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -2a = 0 + 9
-2a = 0 + 9

Combine like terms: 0 + 9 = 9
-2a = 9

Divide each side by '-2'.
a = -4.5

Simplifying
a = -4.5

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