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Q.

On a car trip Sam drove m miles, Kara drove twice as many as Sam, and Darin drove 20 fewer miles then Kara. In terms of m how many miles did Darin drive?


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a

Question Image

b

Question Image

c

Question Image

d

Question Image 

answer is B.

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Detailed Solution

Concept- We needed to form an equation in terms of 'm' for how many miles Darin must drive. Let us assemble the hints given in the question that m miles given by Sam and twice that has been driven by Kara, and as for Darin it is 20 miles less.
Here, Number of miles driven by Sam Question ImageSince Kara drove twice as many miles as Sam,
Number of miles drove by Question ImageSince Darin drove 20 fewer miles than Kara,
Number of miles drove by Darin Question Image Number of miles drove by Kara Question ImageQuestion ImageTherefore, Darin drove Question Image miles.
Hence, the correct answer is option 2) Question Image.
 
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