21a-3a-9a+6a=

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Solution for 21a-3a-9a+6a= equation: 


Simplifying
21a + -3a + -9a + 6a = 0

Combine like terms: 21a + -3a = 18a
18a + -9a + 6a = 0

Combine like terms: 18a + -9a = 9a
9a + 6a = 0

Combine like terms: 9a + 6a = 15a
15a = 0

Solving
15a = 0

Solving for variable 'a'.

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

Divide each side by '15'.
a = 0

Simplifying
a = 0

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