Solving Equations Application
Statins are used to keep cholesterol in check and are a top-selling drug in the U.S. The equation:  S=6.2+1.4x \displaystyle \ {S}={6.2}+{1.4}{x}\ estimates the amount of sales (S\displaystyle {S}) of statin in billions of dollars x\displaystyle {x} years after 1998.
Sales of statin in the year 2005 was billion dollars.
Sales of statin in the year was 15.3 billion dollars.
Round your answer to the nearest year.

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