15a+3-9=3(A+6)

Solution for 15a+3-9=3(A+6) equation:

Simplifying
15a + 3 + -9 = 3(A + 6)

Reorder the terms:
3 + -9 + 15a = 3(A + 6)

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

Reorder the terms:
-6 + 15a = 3(6 + A)
-6 + 15a = (6 * 3 + A * 3)
-6 + 15a = (18 + 3A)

Solving
-6 + 15a = 18 + 3A

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 + 15a = 18 + 6 + 3A

Combine like terms: -6 + 6 = 0
0 + 15a = 18 + 6 + 3A
15a = 18 + 6 + 3A

Combine like terms: 18 + 6 = 24
15a = 24 + 3A

Divide each side by '15'.
a = 1.6 + 0.2A

Simplifying
a = 1.6 + 0.2A