-84a+21a=

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Solution for -84a+21a= equation:


Simplifying
-84a + 21a = 0

Combine like terms: -84a + 21a = -63a
-63a = 0

Solving
-63a = 0

Solving for variable 'a'.

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

Divide each side by '-63'.
a = 0

Simplifying
a = 0

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