If \(d=2c\) and \(e=\dfrac{a}2,\) what is \(x\) in terms of \(a, b,\) and \(c?\)

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If \(d=2c\) and \(e=\dfrac{a}2,\) what is \(x\) in terms of \(a, b,\) and \(c?\)

(A) \(\dfrac32a+b+3c-540\)

(B) \(\dfrac32a+b+3c\)

(C) \(720-\dfrac32a-b-3c\)

(D) \(720-\dfrac12a-b−2c\)

(E) \(540-\dfrac12a-b-\dfrac32c\)

Answer: A

Source: Manhattan GMAT
Source: — Problem Solving |