Statins are used to keep cholesterol in check and are a top-selling drug in the U. S. The equation: S - 1.3x= 5.2

gives the amount of sales (S) of statin in billions of dollars 2 years after 1998. According to this

equation, how much will/did people in the U. S. spend on statins in the year 2007?

People in the U. S. will spend

billion dollars on statins in 2007.