Solve for x
x=\frac{y+49}{605}
Solve for y
y=605x-49
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605x-49=y
Swap sides so that all variable terms are on the left hand side.
605x=y+49
Add 49 to both sides.
\frac{605x}{605}=\frac{y+49}{605}
Divide both sides by 605.
x=\frac{y+49}{605}
Dividing by 605 undoes the multiplication by 605.
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