12a+-a+-8a=-18

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Solution for 12a+-a+-8a=-18 equation: 


Simplifying
12a + -1a + -8a = -18

Combine like terms: 12a + -1a = 11a
11a + -8a = -18

Combine like terms: 11a + -8a = 3a
3a = -18

Solving
3a = -18

Solving for variable 'a'.

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

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

Simplifying
a = -6

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