Solve for d
d=\frac{19-w}{2}
Solve for w
w=19-2d
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4d=38-2w
Subtract 2w from both sides.
\frac{4d}{4}=\frac{38-2w}{4}
Divide both sides by 4.
d=\frac{38-2w}{4}
Dividing by 4 undoes the multiplication by 4.
d=\frac{19-w}{2}
Divide 38-2w by 4.
2w=38-4d
Subtract 4d from both sides.
\frac{2w}{2}=\frac{38-4d}{2}
Divide both sides by 2.
w=\frac{38-4d}{2}
Dividing by 2 undoes the multiplication by 2.
w=19-2d
Divide 38-4d by 2.
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