p+s=2(r-4)

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Solution for p+s=2(r-4) equation: 


Simplifying
p + s = 2(r + -4)

Reorder the terms:
p + s = 2(-4 + r)
p + s = (-4 * 2 + r * 2)
p + s = (-8 + 2r)

Solving
p + s = -8 + 2r

Solving for variable 'p'.

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

Add '-1s' to each side of the equation.
p + s + -1s = -8 + 2r + -1s

Combine like terms: s + -1s = 0
p + 0 = -8 + 2r + -1s
p = -8 + 2r + -1s

Simplifying
p = -8 + 2r + -1s

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