GMAT Practice Question Set #12 (Question 34-36)

Problem Solving Question #34: Algebraic Equality  
Time 0 0 : 0 0 : 0 0

If 2ab - c = 2a(b - c), which of the following must be true?

(A)

a=0 and c=0

(B)

a=1/2 and b=2

(C)

b=1 and c=0

(D)

a=1 or b=0

(E)

a=1/2 or c=0

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