Answer:
whatcha tryna accomplish here bud....
None of your answers are correct
all you have to do it look at what place the value underlined
for example, find value of 5 in 517,849
the 5 is in the 100 thousands place this means that the value is 500,000
The sum of b and f is b+f
Three times this sum is 3(b+f)
The answer to this would be 5x+6>=21. Just wanted points :P