12+9s=57

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Solution for 12+9s=57 equation: 


Simplifying
12 + 9s = 57

Solving
12 + 9s = 57

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 = 57 + -12

Combine like terms: 12 + -12 = 0
0 + 9s = 57 + -12
9s = 57 + -12

Combine like terms: 57 + -12 = 45
9s = 45

Divide each side by '9'.
s = 5

Simplifying
s = 5

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