p+q=r

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Solution for p+q=r equation: 


Simplifying
p + q = r

Solving
p + 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.
p + q + -1q = -1q + r

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

Simplifying
p = -1q + r

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