SOLUTION: 21 _____ _____ 63 these numbers and spaces are on a number line what is the formula to figure the missing numbers?

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Question 216215: 21 _____ _____ 63 these numbers and spaces are on a number line what is the formula to figure the missing numbers?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
(63-21)/(N-1)=42/(4-1)=42/3=14
21+14=35+14=49+14=63