S+t=r

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Solution for S+t=r equation: 


Simplifying
S + t = r

Solving
S + t = r

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 = r + -1t

Combine like terms: t + -1t = 0
S + 0 = r + -1t
S = r + -1t

Simplifying
S = r + -1t

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