21=3-6s

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Solution for 21=3-6s equation:


Simplifying
21 = 3 + -6s

Solving
21 = 3 + -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.
21 + 6s = 3 + -6s + 6s

Combine like terms: -6s + 6s = 0
21 + 6s = 3 + 0
21 + 6s = 3

Add '-21' to each side of the equation.
21 + -21 + 6s = 3 + -21

Combine like terms: 21 + -21 = 0
0 + 6s = 3 + -21
6s = 3 + -21

Combine like terms: 3 + -21 = -18
6s = -18

Divide each side by '6'.
s = -3

Simplifying
s = -3

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