-3[2q-1]=15

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Solution for -3[2q-1]=15 equation: 


Simplifying
-3[2q + -1] = 15

Reorder the terms:
-3[-1 + 2q] = 15
[-1 * -3 + 2q * -3] = 15
[3 + -6q] = 15

Solving
3 + -6q = 15

Solving for variable 'q'.

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

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

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

Combine like terms: 15 + -3 = 12
-6q = 12

Divide each side by '-6'.
q = -2

Simplifying
q = -2

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