Solve for m
m=\frac{10d}{21}
Solve for d
d=\frac{21m}{10}
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2.1m=d
Swap sides so that all variable terms are on the left hand side.
\frac{2.1m}{2.1}=\frac{d}{2.1}
Divide both sides of the equation by 2.1, which is the same as multiplying both sides by the reciprocal of the fraction.
m=\frac{d}{2.1}
Dividing by 2.1 undoes the multiplication by 2.1.
m=\frac{10d}{21}
Divide d by 2.1 by multiplying d by the reciprocal of 2.1.
Examples
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Simultaneous equation
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Integration
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Limits
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