2[a+3]=9

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Solution for 2[a+3]=9 equation: 


Simplifying
2[a + 3] = 9

Reorder the terms:
2[3 + a] = 9
[3 * 2 + a * 2] = 9
[6 + 2a] = 9

Solving
6 + 2a = 9

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 + 2a = 9 + -6

Combine like terms: 6 + -6 = 0
0 + 2a = 9 + -6
2a = 9 + -6

Combine like terms: 9 + -6 = 3
2a = 3

Divide each side by '2'.
a = 1.5

Simplifying
a = 1.5

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