200.5-20.5*s=77.5

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Solution for 200.5-20.5*s=77.5 equation: 


Simplifying
200.5 + -20.5s = 77.5

Solving
200.5 + -20.5s = 77.5

Solving for variable 's'.

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

Add '-200.5' to each side of the equation.
200.5 + -200.5 + -20.5s = 77.5 + -200.5

Combine like terms: 200.5 + -200.5 = 0.0
0.0 + -20.5s = 77.5 + -200.5
-20.5s = 77.5 + -200.5

Combine like terms: 77.5 + -200.5 = -123
-20.5s = -123

Divide each side by '-20.5'.
s = 6

Simplifying
s = 6

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