five years hence, the age of Jacob will be three times that of his son.5 years ago, Jacob's age was 7 times that of his son. what are their present ages?"plz answer it fast" today i have exam
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Answer:
Step-by-step explanation:
J + 5 = 3(S + 5) = 3S + 15
J - 5 = 7(S - 5) = 7S - 35
Subtract
10 = -4S + 50
4S = 40
S = 10
J = 40
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