sr-t=us+t

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Solution for sr-t=us+t equation: 


Simplifying
sr + -1t = us + t

Solving
rs + -1t = su + t

Solving for variable 'r'.

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

Add 't' to each side of the equation.
rs + -1t + t = su + t + t

Combine like terms: -1t + t = 0
rs + 0 = su + t + t
rs = su + t + t

Combine like terms: t + t = 2t
rs = su + 2t

Divide each side by 's'.
r = u + 2s-1t

Simplifying
r = u + 2s-1t

Reorder the terms:
r = 2s-1t + u

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