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15-07-2017
Mathematics

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Jack and jill each own a collection of mp3 files. jill has six mp3 files less than three times the number that jack has. if jill owns 135 mp3 files, then how many does jack own

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sophiemcdo sophiemcdo

15-07-2017

Jack: x mp3 Files
Jill: y mp3 Files
y-6=x×3
135-6=x×3
129:3=x
x=43

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