Solve for x
x=5y+\frac{21}{2}
Solve for y
y=\frac{x}{5}-\frac{21}{10}
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-2x+21=-10y
Swap sides so that all variable terms are on the left hand side.
-2x=-10y-21
Subtract 21 from both sides.
\frac{-2x}{-2}=\frac{-10y-21}{-2}
Divide both sides by -2.
x=\frac{-10y-21}{-2}
Dividing by -2 undoes the multiplication by -2.
x=5y+\frac{21}{2}
Divide -10y-21 by -2.
-10y=21-2x
The equation is in standard form.
\frac{-10y}{-10}=\frac{21-2x}{-10}
Divide both sides by -10.
y=\frac{21-2x}{-10}
Dividing by -10 undoes the multiplication by -10.
y=\frac{x}{5}-\frac{21}{10}
Divide -2x+21 by -10.
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