Solve for j
j=-\frac{p}{3}+\frac{1}{3}i
Solve for p
p=i-3j
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i-3j=p
Swap sides so that all variable terms are on the left hand side.
-3j=p-i
Subtract i from both sides.
\frac{-3j}{-3}=\frac{p-i}{-3}
Divide both sides by -3.
j=\frac{p-i}{-3}
Dividing by -3 undoes the multiplication by -3.
j=-\frac{p}{3}+\frac{1}{3}i
Divide p-i by -3.
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