12a+3a-7a-9a=

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Solution for 12a+3a-7a-9a= equation: 


Simplifying
12a + 3a + -7a + -9a = 0

Combine like terms: 12a + 3a = 15a
15a + -7a + -9a = 0

Combine like terms: 15a + -7a = 8a
8a + -9a = 0

Combine like terms: 8a + -9a = -1a
-1a = 0

Solving
-1a = 0

Solving for variable 'a'.

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

Divide each side by '-1'.
a = 0

Simplifying
a = 0

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