2r-s=k

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Solution for 2r-s=k equation: 


Simplifying
2r + -1s = k

Solving
2r + -1s = k

Solving for variable 'r'.

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

Add 's' to each side of the equation.
2r + -1s + s = k + s

Combine like terms: -1s + s = 0
2r + 0 = k + s
2r = k + s

Divide each side by '2'.
r = 0.5k + 0.5s

Simplifying
r = 0.5k + 0.5s

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