9a-4=12.2

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Solution for 9a-4=12.2 equation: 


Simplifying
9a + -4 = 12.2

Reorder the terms:
-4 + 9a = 12.2

Solving
-4 + 9a = 12.2

Solving for variable 'a'.

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

Add '4' to each side of the equation.
-4 + 4 + 9a = 12.2 + 4

Combine like terms: -4 + 4 = 0
0 + 9a = 12.2 + 4
9a = 12.2 + 4

Combine like terms: 12.2 + 4 = 16.2
9a = 16.2

Divide each side by '9'.
a = 1.8

Simplifying
a = 1.8

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