15=9-s

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Solution for 15=9-s equation:


Simplifying
15 = 9 + -1s

Solving
15 = 9 + -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.
15 + s = 9 + -1s + s

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

Add '-15' to each side of the equation.
15 + -15 + s = 9 + -15

Combine like terms: 15 + -15 = 0
0 + s = 9 + -15
s = 9 + -15

Combine like terms: 9 + -15 = -6
s = -6

Simplifying
s = -6

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