20=1-s

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Solution for 20=1-s equation:


Simplifying
20 = 1 + -1s

Solving
20 = 1 + -1s

Solving for variable 's'.

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

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

Combine like terms: -1s + s = 0
20 + s = 1 + 0
20 + s = 1

Add '-20' to each side of the equation.
20 + -20 + s = 1 + -20

Combine like terms: 20 + -20 = 0
0 + s = 1 + -20
s = 1 + -20

Combine like terms: 1 + -20 = -19
s = -19

Simplifying
s = -19

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