px-q=rx+q

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Solution for px-q=rx+q equation: 


Simplifying
px + -1q = rx + q

Reorder the terms:
px + -1q = q + rx

Solving
px + -1q = q + rx

Solving for variable 'p'.

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

Add 'q' to each side of the equation.
px + -1q + q = q + q + rx

Combine like terms: -1q + q = 0
px + 0 = q + q + rx
px = q + q + rx

Combine like terms: q + q = 2q
px = 2q + rx

Divide each side by 'x'.
p = 2qx-1 + r

Simplifying
p = 2qx-1 + r

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