.89=.8*k

Solution for .89=.8*k equation:

Simplifying
0.89 = 0.8k

Solving
0.89 = 0.8k

Solving for variable 'k'.

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

Add '-0.8k' to each side of the equation.
0.89 + -0.8k = 0.8k + -0.8k

Combine like terms: 0.8k + -0.8k = 0.0
0.89 + -0.8k = 0.0

Add '-0.89' to each side of the equation.
0.89 + -0.89 + -0.8k = 0.0 + -0.89

Combine like terms: 0.89 + -0.89 = 0.00
0.00 + -0.8k = 0.0 + -0.89
-0.8k = 0.0 + -0.89

Combine like terms: 0.0 + -0.89 = -0.89
-0.8k = -0.89

Divide each side by '-0.8'.
k = 1.1125

Simplifying
k = 1.1125