Solve for x
x=\frac{y+30}{10}
Solve for y
y=10\left(x-3\right)
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10x-30=y
Swap sides so that all variable terms are on the left hand side.
10x=y+30
Add 30 to both sides.
\frac{10x}{10}=\frac{y+30}{10}
Divide both sides by 10.
x=\frac{y+30}{10}
Dividing by 10 undoes the multiplication by 10.
x=\frac{y}{10}+3
Divide y+30 by 10.
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