12=a+6-3a

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


Simplifying
12 = a + 6 + -3a

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

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

Solving
12 = 6 + -2a

Solving for variable 'a'.

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

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

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

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

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

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

Divide each side by '2'.
a = -3

Simplifying
a = -3

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