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$y = \fraction{1}{2} x - 5 $
Solve for x
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Solve for y
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\frac{1}{2}x-5=y
Swap sides so that all variable terms are on the left hand side.
\frac{1}{2}x=y+5
Add 5 to both sides.
\frac{\frac{1}{2}x}{\frac{1}{2}}=\frac{y+5}{\frac{1}{2}}
Multiply both sides by 2.
x=\frac{y+5}{\frac{1}{2}}
Dividing by \frac{1}{2} undoes the multiplication by \frac{1}{2}.
x=2y+10
Divide y+5 by \frac{1}{2} by multiplying y+5 by the reciprocal of \frac{1}{2}.