6 ms·

Here's the simplest form I could distill it to. The other comments I find quite verbose or confusing, no offense intended. x: Ann's current age y: The

Here's the simplest form I could distill it to. The other comments I find quite verbose or confusing, no offense intended. x: Ann's current age y: The age difference between Ann and Mary 24 = x + y (ie. their current ages) x = (24/2) + y (ie. their age in the past) Solve for y in one equation and plug it into the other. You'll get x = 18.

xeyownt 2mo ago
That's not how I read it. I read it as: Now : Mary is 24 = 2y, Ann is x Past: Mary is x, Ann is 12 = y Moreover, we have x + delta = 24, and 12 + delta = x (they get older at same rate), so delta = 6 and x = 18.
deleted 2mo ago
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