r*s=t-9

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Solution for r*s=t-9 equation: 


Simplifying
r * s = t + -9

Multiply r * s
rs = t + -9

Reorder the terms:
rs = -9 + t

Solving
rs = -9 + t

Solving for variable 'r'.

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

Divide each side by 's'.
r = -9s-1 + s-1t

Simplifying
r = -9s-1 + s-1t

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