6=8[s-.75]-20

Solution for 6=8[s-.75]-20 equation:

Simplifying
6 = 8[s + -0.75] + -20

Reorder the terms:
6 = 8[-0.75 + s] + -20
6 = [-0.75 * 8 + s * 8] + -20
6 = [-6 + 8s] + -20

Reorder the terms:
6 = -6 + -20 + 8s

Combine like terms: -6 + -20 = -26
6 = -26 + 8s

Solving
6 = -26 + 8s

Solving for variable 's'.

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

Add '-8s' to each side of the equation.
6 + -8s = -26 + 8s + -8s

Combine like terms: 8s + -8s = 0
6 + -8s = -26 + 0
6 + -8s = -26

Add '-6' to each side of the equation.
6 + -6 + -8s = -26 + -6

Combine like terms: 6 + -6 = 0
0 + -8s = -26 + -6
-8s = -26 + -6

Combine like terms: -26 + -6 = -32
-8s = -32

Divide each side by '-8'.
s = 4

Simplifying
s = 4