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Mathematics 7 Online
OpenStudy (anonymous):

3 siblings committed 115 hrs dave worked 10 hr more than john tammy worked 15 hours less than dave how many hrs did each work thanks in advance

OpenStudy (anonymous):

lost your train of thought? my brain froze to

OpenStudy (anonymous):

Refer to the attachment, a calculation using Mathematica.

OpenStudy (anonymous):

thank you

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