这数学怎么解？
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Rosili is now 28 years old than his son
in five years age his was twice as old as his son
let us suppose his son's age is x ,his age is y
so we can get a formula y = 28 + x; (y -5) = 2(x - 5);
so we can get y =61, x= 33
in five years age his was twice as old as his son
let us suppose his son's age is x ,his age is y
so we can get a formula y = 28 + x; (y -5) = 2(x - 5);
so we can get y =61, x= 33
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