-12-a=-30

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Solution for -12-a=-30 equation: 


Simplifying
-12 + -1a = -30

Solving
-12 + -1a = -30

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 + -1a = -30 + 12

Combine like terms: -12 + 12 = 0
0 + -1a = -30 + 12
-1a = -30 + 12

Combine like terms: -30 + 12 = -18
-1a = -18

Divide each side by '-1'.
a = 18

Simplifying
a = 18

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