Solve for x
x=\frac{y-14000}{800}
Solve for y
y=800x+14000
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800x+14000=y
Swap sides so that all variable terms are on the left hand side.
800x=y-14000
Subtract 14000 from both sides.
\frac{800x}{800}=\frac{y-14000}{800}
Divide both sides by 800.
x=\frac{y-14000}{800}
Dividing by 800 undoes the multiplication by 800.
x=\frac{y}{800}-\frac{35}{2}
Divide y-14000 by 800.
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