rs+t=u

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Solution for rs+t=u equation: 


Simplifying
rs + t = u

Solving
rs + t = u

Solving for variable 'r'.

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

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

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

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

Simplifying
r = -1s-1t + s-1u

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