Solve for x
x=\frac{y-180}{75}
Solve for y
y=75x+180
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180+75x=y
Swap sides so that all variable terms are on the left hand side.
75x=y-180
Subtract 180 from both sides.
\frac{75x}{75}=\frac{y-180}{75}
Divide both sides by 75.
x=\frac{y-180}{75}
Dividing by 75 undoes the multiplication by 75.
x=\frac{y}{75}-\frac{12}{5}
Divide y-180 by 75.
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