Answer:
2x+4x=6x
Step-by-step explanation:
Answer:
8000
Step-by-step explanation:
Let the required number be x.

Here is your answer:
6.78 rounded to the nearest tenth = 7.00 because the 7 in 6.78 is greater then five.
8.21 rounded to the nearest tenth= 8.00 because the 2 in 8.21 is NOT greater than five.