Sx-tx=r

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Solution for Sx-tx=r equation: 


Simplifying
Sx + -1tx = r

Reorder the terms:
-1tx + xS = r

Solving
-1tx + xS = r

Solving for variable 't'.

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

Add '-1xS' to each side of the equation.
-1tx + xS + -1xS = r + -1xS

Combine like terms: xS + -1xS = 0
-1tx + 0 = r + -1xS
-1tx = r + -1xS

Divide each side by '-1x'.
t = -1rx-1 + S

Simplifying
t = -1rx-1 + S

Reorder the terms:
t = S + -1rx-1

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