Answer:
8 years old
Step by Step Explaination:
Let x = Jason's age now
4x = father's age now
x+28 = Jason's age in 28 years and 4x+28 = father's age in 28 years
x+28 = (3/5)(4x+28)
5x+140 = 12x+ 84
7x = 56
x = 8
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