-12-3a=3a+6a

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


Simplifying
-12 + -3a = 3a + 6a

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

Solving
-12 + -3a = 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.
-12 + -3a + -9a = 9a + -9a

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

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

Add '12' to each side of the equation.
-12 + 12 + -12a = 0 + 12

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

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

Divide each side by '-12'.
a = -1

Simplifying
a = -1

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