Solve for x
x=\frac{y-5000}{150}
Solve for y
y=150x+5000
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150x+5000=y
Swap sides so that all variable terms are on the left hand side.
150x=y-5000
Subtract 5000 from both sides.
\frac{150x}{150}=\frac{y-5000}{150}
Divide both sides by 150.
x=\frac{y-5000}{150}
Dividing by 150 undoes the multiplication by 150.
x=\frac{y}{150}-\frac{100}{3}
Divide y-5000 by 150.
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