Solve for x
x=\frac{D}{3}
Solve for D
D=3x
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D=3x
Combine \frac{7}{3}x and \frac{2}{3}x to get 3x.
3x=D
Swap sides so that all variable terms are on the left hand side.
\frac{3x}{3}=\frac{D}{3}
Divide both sides by 3.
x=\frac{D}{3}
Dividing by 3 undoes the multiplication by 3.
D=3x
Combine \frac{7}{3}x and \frac{2}{3}x to get 3x.
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