s*6+21=123

Solution for s*6+21=123 equation:

Simplifying
s * 6 + 21 = 123

Reorder the terms for easier multiplication:
6s + 21 = 123

Reorder the terms:
21 + 6s = 123

Solving
21 + 6s = 123

Solving for variable 's'.

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

Add '-21' to each side of the equation.
21 + -21 + 6s = 123 + -21

Combine like terms: 21 + -21 = 0
0 + 6s = 123 + -21
6s = 123 + -21

Combine like terms: 123 + -21 = 102
6s = 102

Divide each side by '6'.
s = 17

Simplifying
s = 17