ak-r=k

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Solution for ak-r=k equation: 


Simplifying
ak + -1r = k

Solving
ak + -1r = k

Solving for variable 'a'.

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

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

Combine like terms: -1r + r = 0
ak + 0 = k + r
ak = k + r

Divide each side by 'k'.
a = 1 + k-1r

Simplifying
a = 1 + k-1r

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