-12=-4+a

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Solution for -12=-4+a equation:


Simplifying
-12 = -4 + a

Solving
-12 = -4 + a

Solving for variable 'a'.

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

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

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

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

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

Combine like terms: -4 + 12 = 8
-1a = 8

Divide each side by '-1'.
a = -8

Simplifying
a = -8

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