Question

what is the value of d pls do in step wise​

Answer 1

Hope it may help you...

Answer 2

         

$d(p-q)=q-p \\ \\ \Rightarrow\ d(p-q)=-p+q \\ \\ \Rightarrow\ d(p-q)=-(p-q) \\ \\ \Rightarrow\ d=\bold{-1} \\ \\ \\ OR$

$d(p-q)=q-p \\ \\ \\ \Rightarrow\ d=\frac{q-p}{p-q} \\ \\ \\ \Rightarrow\ d \times -1=\frac{q-p}{p-q} \times -1 \\ \\ \\ \Rightarrow\ -d=\frac{-1(q-p)}{p-q} \\ \\ \\ \Rightarrow\ -d=\frac{-q+p}{p-q} \\ \\ \\ \Rightarrow\ -d=\frac{p-q}{p-q} \\ \\ \\ \Rightarrow\ -d=1 \\ \\ \\ \Rightarrow\ d=\bold{-1}$

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