3a-6=a+12

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Solution for 3a-6=a+12 equation:


Simplifying
3a + -6 = a + 12

Reorder the terms:
-6 + 3a = a + 12

Reorder the terms:
-6 + 3a = 12 + a

Solving
-6 + 3a = 12 + 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.
-6 + 3a + -1a = 12 + a + -1a

Combine like terms: 3a + -1a = 2a
-6 + 2a = 12 + a + -1a

Combine like terms: a + -1a = 0
-6 + 2a = 12 + 0
-6 + 2a = 12

Add '6' to each side of the equation.
-6 + 6 + 2a = 12 + 6

Combine like terms: -6 + 6 = 0
0 + 2a = 12 + 6
2a = 12 + 6

Combine like terms: 12 + 6 = 18
2a = 18

Divide each side by '2'.
a = 9

Simplifying
a = 9

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