[tex]7 - 12 + 1 - 7 \times \frac{?}{?} [/tex]
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When you divide fractions, you are actually multiplying by the reciprocal
So
[tex]-\frac{7}{12} \div\frac{1}{7} =-\frac{7}{12}\times\frac{7}{1}=- \frac{49}{12}[/tex]