The sum of the ages of A and B is 50 years. If A is 10 years older than B, what are their ages?
Let B's age be x years. Then A's age = x + 10 years. According to the problem: x + (x + 10) = 50 2x + 10 = 50 2x = 40 x = 20. So, A = 20 + 10 = 30 years, B = 20 years. Correct option: a) A = 30, B = 20
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