3s-9=-21+9s

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Solution for 3s-9=-21+9s equation:


Simplifying
3s + -9 = -21 + 9s

Reorder the terms:
-9 + 3s = -21 + 9s

Solving
-9 + 3s = -21 + 9s

Solving for variable 's'.

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

Add '-9s' to each side of the equation.
-9 + 3s + -9s = -21 + 9s + -9s

Combine like terms: 3s + -9s = -6s
-9 + -6s = -21 + 9s + -9s

Combine like terms: 9s + -9s = 0
-9 + -6s = -21 + 0
-9 + -6s = -21

Add '9' to each side of the equation.
-9 + 9 + -6s = -21 + 9

Combine like terms: -9 + 9 = 0
0 + -6s = -21 + 9
-6s = -21 + 9

Combine like terms: -21 + 9 = -12
-6s = -12

Divide each side by '-6'.
s = 2

Simplifying
s = 2

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