Subtract: (3g -4) - 2(3g + 4)
First, distribute the -2 to both terms inside the parentheses:
3g - 4 - 2(3g) - 2(4)
Simplify:
3g - 4 - 6g - 8
Combine like terms:
(3g - 6g) + (-4 - 8)
-3g - 12
Thus, (3g - 4) - 2(3g + 4) simplifies to -3g - 12.