John is 5 years older than Mary. In 10 years, twice John's age decreased by Mary's age is 35, and John's age will be twice Mary's current age. Find their ages now. If x is Mary's age now and y is John's age now, which system of equations could not be used to solve the problem? 1. y = x + 5 and y + 10 = 2x 2. y = x + 5 and 2 (y + 10) - (x + 10) = 35 3. y = x + 5 and 2 (y + 10) = x
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