r+s-1=P

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Solution for r+s-1=P equation:


Simplifying
r + s + -1 = P

Reorder the terms:
-1 + r + s = P

Solving
-1 + r + s = P

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + r + 1 + s = 1 + P

Reorder the terms:
-1 + 1 + r + s = 1 + P

Combine like terms: -1 + 1 = 0
0 + r + s = 1 + P
r + s = 1 + P

Add '-1s' to each side of the equation.
r + s + -1s = 1 + P + -1s

Combine like terms: s + -1s = 0
r + 0 = 1 + P + -1s
r = 1 + P + -1s

Simplifying
r = 1 + P + -1s

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