Examples
x-2=2y
Step 1
Rewrite the equation as 2y=x-2.
2y=x-2
Step 2
Step 2.1
Divide each term in 2y=x-2 by 2.
2y2=x2+-22
Step 2.2
Simplify the left side.
Step 2.2.1
Cancel the common factor of 2.
Step 2.2.1.1
Cancel the common factor.
2y2=x2+-22
Step 2.2.1.2
Divide y by 1.
y=x2+-22
y=x2+-22
y=x2+-22
Step 2.3
Simplify the right side.
Step 2.3.1
Divide -2 by 2.
y=x2-1
y=x2-1
y=x2-1
Step 3
To rewrite as a function of x, write the equation so that y is by itself on one side of the equal sign and an expression involving only x is on the other side.
f(x)=x2-1