102=s+6+s+6+s+s+2s

Solution for 102=s+6+s+6+s+s+2s equation:

Simplifying
102 = s + 6 + s + 6 + s + s + 2s

Reorder the terms:
102 = 6 + 6 + s + s + s + s + 2s

Combine like terms: 6 + 6 = 12
102 = 12 + s + s + s + s + 2s

Combine like terms: s + s = 2s
102 = 12 + 2s + s + s + 2s

Combine like terms: 2s + s = 3s
102 = 12 + 3s + s + 2s

Combine like terms: 3s + s = 4s
102 = 12 + 4s + 2s

Combine like terms: 4s + 2s = 6s
102 = 12 + 6s

Solving
102 = 12 + 6s

Solving for variable 's'.

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

Add '-6s' to each side of the equation.
102 + -6s = 12 + 6s + -6s

Combine like terms: 6s + -6s = 0
102 + -6s = 12 + 0
102 + -6s = 12

Add '-102' to each side of the equation.
102 + -102 + -6s = 12 + -102

Combine like terms: 102 + -102 = 0
0 + -6s = 12 + -102
-6s = 12 + -102

Combine like terms: 12 + -102 = -90
-6s = -90

Divide each side by '-6'.
s = 15

Simplifying
s = 15