Solve for x
x=\frac{104-5y}{21}
Solve for y
y=\frac{104-21x}{5}
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21x=104-5y
Subtract 5y from both sides.
\frac{21x}{21}=\frac{104-5y}{21}
Divide both sides by 21.
x=\frac{104-5y}{21}
Dividing by 21 undoes the multiplication by 21.
5y=104-21x
Subtract 21x from both sides.
\frac{5y}{5}=\frac{104-21x}{5}
Divide both sides by 5.
y=\frac{104-21x}{5}
Dividing by 5 undoes the multiplication by 5.
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