How do you solve 18-(3x 5)5 (x-1)-6?

To solve the expression ( 18 - (3 \times 5)5 (x - 1) - 6 ), start by simplifying the multiplication: ( 3 \times 5 = 15 ), so the expression becomes ( 18 - 15 \cdot 5 (x - 1) - 6 ). Next, calculate ( 15 \cdot 5 = 75 ), which gives you ( 18 - 75(x - 1) - 6 ). Finally, combine the constant terms: ( 18 - 6 = 12 ), resulting in ( 12 - 75(x - 1) ).