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Machine part A must always be four inches smaller in diameter than machine part B's diameter. If machine part A's diameter is 16 inches and machine part B's diameter is x inches, which of the following can be used to solve for x?
A. 16=4X
B. 16=X - 4
C. 16=X+4
D. 16=X/4
     Please help me with this thank you.



Answer :

B. 16 = x - 4. this relation is true!

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