12=11a-9

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Solution for 12=11a-9 equation:


Simplifying
12 = 11a + -9

Reorder the terms:
12 = -9 + 11a

Solving
12 = -9 + 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.
12 + -11a = -9 + 11a + -11a

Combine like terms: 11a + -11a = 0
12 + -11a = -9 + 0
12 + -11a = -9

Add '-12' to each side of the equation.
12 + -12 + -11a = -9 + -12

Combine like terms: 12 + -12 = 0
0 + -11a = -9 + -12
-11a = -9 + -12

Combine like terms: -9 + -12 = -21
-11a = -21

Divide each side by '-11'.
a = 1.909090909

Simplifying
a = 1.909090909

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