Move all terms not containing z to the right side of the equation.
Subtract 1.2 from both sides of the equation.
Subtract 1.2 from -11.8.
Divide each term by -2.6 and simplify.
Divide each term in -2.6z=-13 by -2.6.
Cancel the common factor of -2.6.
Divide -13 by -2.6.
Solve for z -2.6z+1.2=-11.8