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OpenStudy (anonymous):
Dr. Garcia is twice as old as her son. Twenty Years ago, he was 4 times as old as his son was then. How old are they now?
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OpenStudy (anonymous):
d = 2s d - 20 = 4(s - 20) 2s - 20 = 4s - 80 2s = 60 s = 30 Can you plug this back in and solve for d?
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