4-a=-12

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Solution for 4-a=-12 equation: 


Simplifying
4 + -1a = -12

Solving
4 + -1a = -12

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + -1a = -12 + -4

Combine like terms: 4 + -4 = 0
0 + -1a = -12 + -4
-1a = -12 + -4

Combine like terms: -12 + -4 = -16
-1a = -16

Divide each side by '-1'.
a = 16

Simplifying
a = 16

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