-a-4=8+a

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Solution for -a-4=8+a equation:


Simplifying
-1a + -4 = 8 + a

Reorder the terms:
-4 + -1a = 8 + a

Solving
-4 + -1a = 8 + 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.
-4 + -1a + -1a = 8 + a + -1a

Combine like terms: -1a + -1a = -2a
-4 + -2a = 8 + a + -1a

Combine like terms: a + -1a = 0
-4 + -2a = 8 + 0
-4 + -2a = 8

Add '4' to each side of the equation.
-4 + 4 + -2a = 8 + 4

Combine like terms: -4 + 4 = 0
0 + -2a = 8 + 4
-2a = 8 + 4

Combine like terms: 8 + 4 = 12
-2a = 12

Divide each side by '-2'.
a = -6

Simplifying
a = -6

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