Rachel, David, and Kristen decide to pool their money to buy à video game system. David contributes 4 dollars more than twice what Kristen does, and Kristen contributes 3 dollars less than Rachel does, If Rachel contributes r dollars, then, in terms of r, how much does David contribute?
A. \(2r-2\)
B. \(\frac{r-2}{2}\)
C. \(\frac{r-7}{2}\)
D. \(\frac{2r+7}{2}\)
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সঠিক উত্তরঃ
A.
\(2r-2\)
Explanation:
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