Solve for x
x=\frac{y-500}{50}
Solve for y
y=50\left(x+10\right)
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y=50x+500
Anything divided by one gives itself.
50x+500=y
Swap sides so that all variable terms are on the left hand side.
50x=y-500
Subtract 500 from both sides.
\frac{50x}{50}=\frac{y-500}{50}
Divide both sides by 50.
x=\frac{y-500}{50}
Dividing by 50 undoes the multiplication by 50.
x=\frac{y}{50}-10
Divide y-500 by 50.
y=50x+500
Anything divided by one gives itself.
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