Solve for x
x=-\frac{y}{2}+15
Solve for y
y=30-2x
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400x=6000-200y
Subtract 200y from both sides.
\frac{400x}{400}=\frac{6000-200y}{400}
Divide both sides by 400.
x=\frac{6000-200y}{400}
Dividing by 400 undoes the multiplication by 400.
x=-\frac{y}{2}+15
Divide 6000-200y by 400.
200y=6000-400x
Subtract 400x from both sides.
\frac{200y}{200}=\frac{6000-400x}{200}
Divide both sides by 200.
y=\frac{6000-400x}{200}
Dividing by 200 undoes the multiplication by 200.
y=30-2x
Divide 6000-400x by 200.
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