Solve for y
y=-\frac{x}{200}+12
Solve for x
x=2400-200y
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200y=2400-x
Subtract x from both sides.
\frac{200y}{200}=\frac{2400-x}{200}
Divide both sides by 200.
y=\frac{2400-x}{200}
Dividing by 200 undoes the multiplication by 200.
y=-\frac{x}{200}+12
Divide 2400-x by 200.
x=2400-200y
Subtract 200y from both sides.
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