-12+(-3a)=0

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Solution for -12+(-3a)=0 equation: 


Simplifying
-12 + (-3a) = 0

Solving
-12 + (-3a) = 0

Solving for variable 'a'.

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

Add '12' to each side of the equation.
-12 + 12 + (-3a) = 0 + 12

Combine like terms: -12 + 12 = 0
0 + (-3a) = 0 + 12
(-3a) = 0 + 12

Combine like terms: 0 + 12 = 12
(-3a) = 12

Divide each side by '-3'.
a = -4

Simplifying
a = -4

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