Answer:
-21x-7w+42
Explanation:
It is -21x-7w+42 because you must distribute the -7 to all of the number and variable inside of the parentheses and so first you would do -7 times 3x so pretend the x isn't there and do -7 times 3 which is -21 because when one is negative the product is negative and when both are negative the product is positive because the negatives cancel out, and then since there is no constant with the w and it is positive you just squish them together to get -7w and then you regulary multiply -7 times -6 which is +42, hope this helped