-2a+3-12=9

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Solution for -2a+3-12=9 equation: 


Simplifying
-2a + 3 + -12 = 9

Reorder the terms:
3 + -12 + -2a = 9

Combine like terms: 3 + -12 = -9
-9 + -2a = 9

Solving
-9 + -2a = 9

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 + -2a = 9 + 9

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

Combine like terms: 9 + 9 = 18
-2a = 18

Divide each side by '-2'.
a = -9

Simplifying
a = -9

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