12-9s=-42

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Solution for 12-9s=-42 equation: 


Simplifying
12 + -9s = -42

Solving
12 + -9s = -42

Solving for variable 's'.

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

Add '-12' to each side of the equation.
12 + -12 + -9s = -42 + -12

Combine like terms: 12 + -12 = 0
0 + -9s = -42 + -12
-9s = -42 + -12

Combine like terms: -42 + -12 = -54
-9s = -54

Divide each side by '-9'.
s = 6

Simplifying
s = 6

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