0.9z-1.91=0.61

Solution for 0.9z-1.91=0.61 equation:

Simplifying
0.9z + -1.91 = 0.61

Reorder the terms:
-1.91 + 0.9z = 0.61

Solving
-1.91 + 0.9z = 0.61

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '1.91' to each side of the equation.
-1.91 + 1.91 + 0.9z = 0.61 + 1.91

Combine like terms: -1.91 + 1.91 = 0.00
0.00 + 0.9z = 0.61 + 1.91
0.9z = 0.61 + 1.91

Combine like terms: 0.61 + 1.91 = 2.52
0.9z = 2.52

Divide each side by '0.9'.
z = 2.8

Simplifying
z = 2.8