8x - (2x + 1) = 3x - 13 (simplify by removing the parenthesis)
8x - 2x -1 = 3x - 13 (subtract the 2x from the 8x and add 1 to both sides of the equation)
6x = 3x - 12 (subtract 3x from both sides of the equation)
3x = -12 (divide both sides by 3)
x = -4