-9+4a=12

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Solution for -9+4a=12 equation: 


Simplifying
-9 + 4a = 12

Solving
-9 + 4a = 12

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 4a = 12 + 9

Combine like terms: -9 + 9 = 0
0 + 4a = 12 + 9
4a = 12 + 9

Combine like terms: 12 + 9 = 21
4a = 21

Divide each side by '4'.
a = 5.25

Simplifying
a = 5.25

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