=9a-3(a+6)

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


Simplifying
0 = 9a + -3(a + 6)

Reorder the terms:
0 = 9a + -3(6 + a)
0 = 9a + (6 * -3 + a * -3)
0 = 9a + (-18 + -3a)

Reorder the terms:
0 = -18 + 9a + -3a

Combine like terms: 9a + -3a = 6a
0 = -18 + 6a

Solving
0 = -18 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
0 + -6a = -18 + 6a + -6a
Remove the zero:
-6a = -18 + 6a + -6a

Combine like terms: 6a + -6a = 0
-6a = -18 + 0
-6a = -18

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

Simplifying
a = 3

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