28-4a=-12

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Solution for 28-4a=-12 equation: 


Simplifying
28 + -4a = -12

Solving
28 + -4a = -12

Solving for variable 'a'.

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

Add '-28' to each side of the equation.
28 + -28 + -4a = -12 + -28

Combine like terms: 28 + -28 = 0
0 + -4a = -12 + -28
-4a = -12 + -28

Combine like terms: -12 + -28 = -40
-4a = -40

Divide each side by '-4'.
a = 10

Simplifying
a = 10

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