Ella is 6 years younger than Amanda. Zoe is twice as old as Amanda. The total of their ages is 54. Which equation can be used to find Amanda's age?
A.) x + (x - 6) + 2(x - 6) = 54
B.) x - 6x + (x + 2) = 54
C.) x - 6 + 2x = 54
D.) x + (x - 6) + 2x = 54
E.) 2(x + 6) + (x + 6) + x = 54
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