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Answer:
[tex]7 \frac{2}{3}=\frac{7*3+2}{3}=\frac{23}{3} [/tex]
[tex]7 \: \frac{1}{2}=\frac{7*2+1}{2}=\frac{15}{2} [/tex]
[tex]5842 \div 23=254[/tex]