st-4r=8

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Solution for st-4r=8 equation: 


Simplifying
st + -4r = 8

Reorder the terms:
-4r + st = 8

Solving
-4r + st = 8

Solving for variable 'r'.

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

Add '-1st' to each side of the equation.
-4r + st + -1st = 8 + -1st

Combine like terms: st + -1st = 0
-4r + 0 = 8 + -1st
-4r = 8 + -1st

Divide each side by '-4'.
r = -2 + 0.25st

Simplifying
r = -2 + 0.25st

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