s+t=15

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Solution for s+t=15 equation: 


Simplifying
s + t = 15

Solving
s + t = 15

Solving for variable 's'.

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

Add '-1t' to each side of the equation.
s + t + -1t = 15 + -1t

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

Simplifying
s = 15 + -1t

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