-4a+-9a+a-9a+-9a=12

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Solution for -4a+-9a+a-9a+-9a=12 equation: 


Simplifying
-4a + -9a + a + -9a + -9a = 12

Combine like terms: -4a + -9a = -13a
-13a + a + -9a + -9a = 12

Combine like terms: -13a + a = -12a
-12a + -9a + -9a = 12

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

Combine like terms: -21a + -9a = -30a
-30a = 12

Solving
-30a = 12

Solving for variable 'a'.

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

Divide each side by '-30'.
a = -0.4

Simplifying
a = -0.4

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