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2x-1=y
Use the distributive property to multiply 2 by x-0,5.
2x=y+1
Add 1 to both sides.
\frac{2x}{2}=\frac{y+1}{2}
Divide both sides by 2.
x=\frac{y+1}{2}
Dividing by 2 undoes the multiplication by 2.
2x-1=y
Use the distributive property to multiply 2 by x-0,5.
y=2x-1
Swap sides so that all variable terms are on the left hand side.