15=3-3(2q-1)

Solution for 15=3-3(2q-1) equation:

Simplifying
15 = 3 + -3(2q + -1)

Reorder the terms:
15 = 3 + -3(-1 + 2q)
15 = 3 + (-1 * -3 + 2q * -3)
15 = 3 + (3 + -6q)

Combine like terms: 3 + 3 = 6
15 = 6 + -6q

Solving
15 = 6 + -6q

Solving for variable 'q'.

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

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

Combine like terms: -6q + 6q = 0
15 + 6q = 6 + 0
15 + 6q = 6

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

Combine like terms: 15 + -15 = 0
0 + 6q = 6 + -15
6q = 6 + -15

Combine like terms: 6 + -15 = -9
6q = -9

Divide each side by '6'.
q = -1.5

Simplifying
q = -1.5