up+ur=r

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Solution for up+ur=r equation:


Simplifying
up + ur = r

Solving
pu + ru = r

Solving for variable 'p'.

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

Add '-1ru' to each side of the equation.
pu + ru + -1ru = r + -1ru

Combine like terms: ru + -1ru = 0
pu + 0 = r + -1ru
pu = r + -1ru

Divide each side by 'u'.
p = ru-1 + -1r

Simplifying
p = ru-1 + -1r

Reorder the terms:
p = -1r + ru-1

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