px-qx=r

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Solution for px-qx=r equation: 


Simplifying
px + -1qx = r

Solving
px + -1qx = r

Solving for variable 'p'.

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

Add 'qx' to each side of the equation.
px + -1qx + qx = qx + r

Combine like terms: -1qx + qx = 0
px + 0 = qx + r
px = qx + r

Divide each side by 'x'.
p = q + rx-1

Simplifying
p = q + rx-1

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