a-9=(13+3a)3

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Solution for a-9=(13+3a)3 equation:


Simplifying
a + -9 = (13 + 3a) * 3

Reorder the terms:
-9 + a = (13 + 3a) * 3

Reorder the terms for easier multiplication:
-9 + a = 3(13 + 3a)
-9 + a = (13 * 3 + 3a * 3)
-9 + a = (39 + 9a)

Solving
-9 + a = 39 + 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.
-9 + a + -9a = 39 + 9a + -9a

Combine like terms: a + -9a = -8a
-9 + -8a = 39 + 9a + -9a

Combine like terms: 9a + -9a = 0
-9 + -8a = 39 + 0
-9 + -8a = 39

Add '9' to each side of the equation.
-9 + 9 + -8a = 39 + 9

Combine like terms: -9 + 9 = 0
0 + -8a = 39 + 9
-8a = 39 + 9

Combine like terms: 39 + 9 = 48
-8a = 48

Divide each side by '-8'.
a = -6

Simplifying
a = -6

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