28=12-8a

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Solution for 28=12-8a equation:


Simplifying
28 = 12 + -8a

Solving
28 = 12 + -8a

Solving for variable 'a'.

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

Add '8a' to each side of the equation.
28 + 8a = 12 + -8a + 8a

Combine like terms: -8a + 8a = 0
28 + 8a = 12 + 0
28 + 8a = 12

Add '-28' to each side of the equation.
28 + -28 + 8a = 12 + -28

Combine like terms: 28 + -28 = 0
0 + 8a = 12 + -28
8a = 12 + -28

Combine like terms: 12 + -28 = -16
8a = -16

Divide each side by '8'.
a = -2

Simplifying
a = -2

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