6(a+2b+3c) It's too short. Write at least 20 characters to get a great answer.
It's too short. Write at least 20 characters to get a great answer.
It's too short. Write at least 20 characters to get a great answer.

6a+12b+18c

Step-by-step explanation:

you distribute it

6a+12b+18c

Explanation: you break the parenthesis and multiply 6 with 1, 2, and 3

both equations and proportions are better.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.