15=6a-6-a

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Solution for 15=6a-6-a equation:


Simplifying
15 = 6a + -6 + -1a

Reorder the terms:
15 = -6 + 6a + -1a

Combine like terms: 6a + -1a = 5a
15 = -6 + 5a

Solving
15 = -6 + 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
15 + -5a = -6 + 5a + -5a

Combine like terms: 5a + -5a = 0
15 + -5a = -6 + 0
15 + -5a = -6

Add '-15' to each side of the equation.
15 + -15 + -5a = -6 + -15

Combine like terms: 15 + -15 = 0
0 + -5a = -6 + -15
-5a = -6 + -15

Combine like terms: -6 + -15 = -21
-5a = -21

Divide each side by '-5'.
a = 4.2

Simplifying
a = 4.2

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