Solve for x
x=\frac{y-25}{10}
Solve for y
y=10x+25
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10x+25=y
Swap sides so that all variable terms are on the left hand side.
10x=y-25
Subtract 25 from both sides.
\frac{10x}{10}=\frac{y-25}{10}
Divide both sides by 10.
x=\frac{y-25}{10}
Dividing by 10 undoes the multiplication by 10.
x=\frac{y}{10}-\frac{5}{2}
Divide y-25 by 10.
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