D. 6 because they will cancel each other out by one being negative and one being positive
Step-by-step explanation:
-3-6x-42=42-6x
-45-6x=42-6x
-87=0
28= b(4)
divide both sides by 4. to leave the variable b alone
Answer: 7=b
125.
16 (10 and 6) divided by 100 is 6.25. Times two is 12.5. (For 200) times 10 for 10 marbles.
Add up all the numbers then divide how many ever digits there are
