3-2(9+a)=a-6

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Solution for 3-2(9+a)=a-6 equation:


Simplifying
3 + -2(9 + a) = a + -6
3 + (9 * -2 + a * -2) = a + -6
3 + (-18 + -2a) = a + -6

Combine like terms: 3 + -18 = -15
-15 + -2a = a + -6

Reorder the terms:
-15 + -2a = -6 + a

Solving
-15 + -2a = -6 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-15 + -2a + -1a = -6 + a + -1a

Combine like terms: -2a + -1a = -3a
-15 + -3a = -6 + a + -1a

Combine like terms: a + -1a = 0
-15 + -3a = -6 + 0
-15 + -3a = -6

Add '15' to each side of the equation.
-15 + 15 + -3a = -6 + 15

Combine like terms: -15 + 15 = 0
0 + -3a = -6 + 15
-3a = -6 + 15

Combine like terms: -6 + 15 = 9
-3a = 9

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

Simplifying
a = -3

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