4+a=12-a

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Solution for 4+a=12-a equation:


Simplifying
4 + a = 12 + -1a

Solving
4 + a = 12 + -1a

Solving for variable 'a'.

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

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

Combine like terms: a + a = 2a
4 + 2a = 12 + -1a + a

Combine like terms: -1a + a = 0
4 + 2a = 12 + 0
4 + 2a = 12

Add '-4' to each side of the equation.
4 + -4 + 2a = 12 + -4

Combine like terms: 4 + -4 = 0
0 + 2a = 12 + -4
2a = 12 + -4

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

Divide each side by '2'.
a = 4

Simplifying
a = 4

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