Rewrite the equation as 2a+1=y.
Subtract 1 from both sides of the equation.
Divide each term by 2 and simplify.
Divide each term in 2a=y-1 by 2.
Cancel the common factor of 2.
Cancel the common factor.
Divide a by 1.
Move the negative in front of the fraction.
Solve for a y=2a+1