9=13-s

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Solution for 9=13-s equation:


Simplifying
9 = 13 + -1s

Solving
9 = 13 + -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.
9 + s = 13 + -1s + s

Combine like terms: -1s + s = 0
9 + s = 13 + 0
9 + s = 13

Add '-9' to each side of the equation.
9 + -9 + s = 13 + -9

Combine like terms: 9 + -9 = 0
0 + s = 13 + -9
s = 13 + -9

Combine like terms: 13 + -9 = 4
s = 4

Simplifying
s = 4

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