p*x+q=r

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Solution for p*x+q=r equation: 


Simplifying
p * x + q = r

Multiply p * x
px + q = r

Solving
px + q = r

Solving for variable 'p'.

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

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

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

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

Simplifying
p = -1qx-1 + rx-1

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