Mathematics, 21.12.2020 01:00 shongmadi77
It takes a total of 78 hours to build four bed frames, a bookcase, and three chairs. It takes 108 hours to build six bed frames and four chairs. It takes 74 hours to build three bed frames, five bookcases, and two chairs.
Answers: 2
![\left[\begin{array}{ccc|c}4&1&3&78\\6&0&4&108\\3&5&2&74\end{array}\right]](/tpl/images/1003/5608/4f786.png)
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It takes a total of 78 hours to build four bed frames, a bookcase, and three chairs. It takes 108 ho...
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