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en is 20 years older than Daniel. Ben and Daniel first met two years ago. Three years ago, Ben was 3 times as old as Daniel.
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Feb 11, 2020
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en is 20 years older than Daniel. Ben and Daniel first met two years ago. Three years ago, Ben was 3 times as old as Daniel.
Mathematics
middle-school
Torsten Becker
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Torsten Becker
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D+20=B
3(D-3)=B-3
plug B in
3(D-3)=D+20-3
3D-9=D+17
2D=26
D=13
13+20=B
B=33
Ben is 33 and Daniel is 13
Peter Eisentraut
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Feb 18, 2020
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Peter Eisentraut
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