Solve for y
y=\frac{x+50}{7}
Solve for x
x=7y-50
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7y=x+50
Add 50 to both sides.
\frac{7y}{7}=\frac{x+50}{7}
Divide both sides by 7.
y=\frac{x+50}{7}
Dividing by 7 undoes the multiplication by 7.
x=7y-50
Swap sides so that all variable terms are on the left hand side.
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