[tex]\bf \left[-5+\left( -1\frac{3}{4} \right) \right]\implies \left[-5+\left( -\frac{1\cdot 4+3}{4} \right) \right]\implies \left[ -5+\left(- \cfrac{7}{4} \right) \right]
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-5-\cfrac{7}{4}\implies \cfrac{(4)(-5)~-~(1)(7)}{4}\implies \cfrac{-20-7}{4}\implies \cfrac{-27}{4}\implies -6\frac{3}{4}[/tex]
