3a+6=9a-12

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Solution for 3a+6=9a-12 equation:


Simplifying
3a + 6 = 9a + -12

Reorder the terms:
6 + 3a = 9a + -12

Reorder the terms:
6 + 3a = -12 + 9a

Solving
6 + 3a = -12 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
6 + 3a + -9a = -12 + 9a + -9a

Combine like terms: 3a + -9a = -6a
6 + -6a = -12 + 9a + -9a

Combine like terms: 9a + -9a = 0
6 + -6a = -12 + 0
6 + -6a = -12

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

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

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

Divide each side by '-6'.
a = 3

Simplifying
a = 3

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