S-.5s+s=18

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Solution for S-.5s+s=18 equation: 


Simplifying
S + -0.5s + s = 18

Combine like terms: -0.5s + s = 0.5s
S + 0.5s = 18

Solving
S + 0.5s = 18

Solving for variable 'S'.

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

Add '-0.5s' to each side of the equation.
S + 0.5s + -0.5s = 18 + -0.5s

Combine like terms: 0.5s + -0.5s = 0.0
S + 0.0 = 18 + -0.5s
S = 18 + -0.5s

Simplifying
S = 18 + -0.5s

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