12a-84=0

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Solution for 12a-84=0 equation: 


Simplifying
12a + -84 = 0

Reorder the terms:
-84 + 12a = 0

Solving
-84 + 12a = 0

Solving for variable 'a'.

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

Add '84' to each side of the equation.
-84 + 84 + 12a = 0 + 84

Combine like terms: -84 + 84 = 0
0 + 12a = 0 + 84
12a = 0 + 84

Combine like terms: 0 + 84 = 84
12a = 84

Divide each side by '12'.
a = 7

Simplifying
a = 7

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