-1(-r+1)=

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Solution for -1(-r+1)= equation: 


Simplifying
-1(-1r + 1) = 0

Reorder the terms:
-1(1 + -1r) = 0
(1 * -1 + -1r * -1) = 0
(-1 + 1r) = 0

Solving
-1 + 1r = 0

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 + 1 + 1r = 0 + 1

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

Combine like terms: 0 + 1 = 1
1r = 1

Divide each side by '1'.
r = 1

Simplifying
r = 1

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