4r-9s=K

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Solution for 4r-9s=K equation: 


Simplifying
4r + -9s = K

Solving
4r + -9s = K

Solving for variable 'r'.

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

Add '9s' to each side of the equation.
4r + -9s + 9s = K + 9s

Combine like terms: -9s + 9s = 0
4r + 0 = K + 9s
4r = K + 9s

Divide each side by '4'.
r = 0.25K + 2.25s

Simplifying
r = 0.25K + 2.25s

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