-21=s+12

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Solution for -21=s+12 equation:


Simplifying
-21 = s + 12

Reorder the terms:
-21 = 12 + s

Solving
-21 = 12 + s

Solving for variable 's'.

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

Add '-1s' to each side of the equation.
-21 + -1s = 12 + s + -1s

Combine like terms: s + -1s = 0
-21 + -1s = 12 + 0
-21 + -1s = 12

Add '21' to each side of the equation.
-21 + 21 + -1s = 12 + 21

Combine like terms: -21 + 21 = 0
0 + -1s = 12 + 21
-1s = 12 + 21

Combine like terms: 12 + 21 = 33
-1s = 33

Divide each side by '-1'.
s = -33

Simplifying
s = -33

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