3s+21=6s-12

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Solution for 3s+21=6s-12 equation:


Simplifying
3s + 21 = 6s + -12

Reorder the terms:
21 + 3s = 6s + -12

Reorder the terms:
21 + 3s = -12 + 6s

Solving
21 + 3s = -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.
21 + 3s + -6s = -12 + 6s + -6s

Combine like terms: 3s + -6s = -3s
21 + -3s = -12 + 6s + -6s

Combine like terms: 6s + -6s = 0
21 + -3s = -12 + 0
21 + -3s = -12

Add '-21' to each side of the equation.
21 + -21 + -3s = -12 + -21

Combine like terms: 21 + -21 = 0
0 + -3s = -12 + -21
-3s = -12 + -21

Combine like terms: -12 + -21 = -33
-3s = -33

Divide each side by '-3'.
s = 11

Simplifying
s = 11

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