Question 642866

a man who is 42 years old has a son of 12 years old. in how many years will the father be twice as old as his son


Let the amount of years be Y


Then: 42 + Y = 2(12 + Y)


42 + Y = 24 + 2Y


42 - 24 = Y


Y, or amount of years it'll take for the man to be twice his son's age = {{{highlight_green(18)}}}


You can do the check!!


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