Move all terms not containing x to the right side of the equation.
Subtract 100 from both sides of the equation.
Subtract 100 from 3.9.
Divide each term by 20 and simplify.
Divide each term in 20x=-96.1 by 20.
Cancel the common factor of 20.
Cancel the common factor.
Divide x by 1.
Divide -96.1 by 20.
Solve using the Square Root Property 100+20x=3.90