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Write the following as an equation. Amy is 16 yrs older than Peter, whose age is 'x' yrs. 6 yrs ago, her age was twice Peter's age at that point.
pick the best answer.     x + 10 = 2 (x - 9),   x + 10 = 2 (x - 7),   x + 10 = 2 (x - 3),  x + 10 = 2 (x - 6).please help me.=D