12-7a=6-a-8a

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Solution for 12-7a=6-a-8a equation:


Simplifying
12 + -7a = 6 + -1a + -8a

Combine like terms: -1a + -8a = -9a
12 + -7a = 6 + -9a

Solving
12 + -7a = 6 + -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 + -7a + 9a = 6 + -9a + 9a

Combine like terms: -7a + 9a = 2a
12 + 2a = 6 + -9a + 9a

Combine like terms: -9a + 9a = 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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