Which equation is not equivalent to the formula d = rt? a. r = t/d b. r = d/t c. t = d/r d. d = tr

B 
is fine you just write d = r*t and then divide both sides by t to get d/t = r

C 
is fine as well. You need only divide both sides by r to get 
r*t = d

rt/r = d/r
t = d/r

D
D is fine. All you have done is interchanged r and t. That's called the associative property of multiplication.

A
is the one that is not correct. 

A <<<< Answer
 

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