Need help on numbers 6, 7, and 8 ill mark brainliest if they are right

please explain how u got the answer

the workers who do no drive has no reasonable reason to buy gasoline due to they don't have anything to use it for

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^

pls refer ro the top for answer