Solve for b
b=10j
Solve for j
j=\frac{b}{10}
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0.1b=j
Swap sides so that all variable terms are on the left hand side.
\frac{0.1b}{0.1}=\frac{j}{0.1}
Multiply both sides by 10.
b=\frac{j}{0.1}
Dividing by 0.1 undoes the multiplication by 0.1.
b=10j
Divide j by 0.1 by multiplying j by the reciprocal of 0.1.
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