SOLUTION: Marty is four years younger than Jennifer now in 10 years Marty will be twice the age that Jennifers now how old is each now

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Question 1105842: Marty is four years younger than Jennifer now in 10 years Marty will be twice the age that Jennifers now how old is each now
Answer by ikleyn(52903) About Me  (Show Source):
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M = J - 4     (1)    ("Marty is four years younger than Jennifer now.")

M+10 = 2J     (2)    ("in 10 years Marty will be twice the age that Jennifers now.)


Substitute expression (1) into eq(2). You will get

J-4 + 10 = 2J  ====>  J = 6.


Then M = J-4 = 2.


Answer.  M = 2,  J = 6.