Rewrite the equation as .

Subtract from both sides of the equation.

Divide each term in by .

Cancel the common factor of .

Simplify each term.

Move the negative in front of the fraction.

Multiply by .

Factor out of .

Separate fractions.

Divide by .

Divide by .

Multiply by .

Divide by .

Solve for y A=3600-0.8y