0=(r-1)

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Solution for 0=(r-1) equation: 


Simplifying
0 = (r + -1)

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

Remove parenthesis around (-1 + r)
0 = -1 + r

Solving
0 = -1 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
0 + -1r = -1 + r + -1r
Remove the zero:
-1r = -1 + r + -1r

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

Divide each side by '-1'.
r = 1

Simplifying
r = 1

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