simplify 6 (3q-4)+18 -12q-7(4q+5)

To simplify the expression 6(3q-4)+18 -12q-7(4q+5):

First, distribute the 6 to the terms inside the first parentheses:
= 6*3q - 6*4 + 18 - 12q - 7(4q+5)

This simplifies to:
= 18q - 24 + 18 - 12q - 28q - 35

Combine like terms:
= (18q - 12q - 28q) + (18 - 24 - 35)
= -22q - 41