15=3(a+3)

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


Simplifying
15 = 3(a + 3)

Reorder the terms:
15 = 3(3 + a)
15 = (3 * 3 + a * 3)
15 = (9 + 3a)

Solving
15 = 9 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
15 + -3a = 9 + 3a + -3a

Combine like terms: 3a + -3a = 0
15 + -3a = 9 + 0
15 + -3a = 9

Add '-15' to each side of the equation.
15 + -15 + -3a = 9 + -15

Combine like terms: 15 + -15 = 0
0 + -3a = 9 + -15
-3a = 9 + -15

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

Divide each side by '-3'.
a = 2

Simplifying
a = 2

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