Move all terms not containing k to the right side of the equation.
Add 1.8 to both sides of the equation.
Add 7.3 and 1.8.
Divide each term by 1.1 and simplify.
Divide each term in 1.1k=9.1 by 1.1.
Cancel the common factor of 1.1.
Divide 9.1 by 1.1.
Solve for k 1.1k-1.8=7.3