Question 435588
Jim is twice as old as Karen.
j = 2k
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Eight years from now, Jim will be twenty years older than Karen.
(j+8) = (k+8)+20
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How old is Jim now?
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Substitute for "j" and solve for "k":
(2k+8) = k+28
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k = 20 (Karen's age now)
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Solve for "j":
j = 2k
j = 2*20 = 40 yrs old (Jim's age now)
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Cheers,
Stan H.