(6+3a)=15

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Solution for (6+3a)=15 equation: 


Simplifying
(6 + 3a) = 15

Remove parenthesis around (6 + 3a)
6 + 3a = 15

Solving
6 + 3a = 15

Solving for variable 'a'.

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

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

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

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

Divide each side by '3'.
a = 3

Simplifying
a = 3

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