-r-1=11

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Solution for -r-1=11 equation: 


Simplifying
-1r + -1 = 11

Reorder the terms:
-1 + -1r = 11

Solving
-1 + -1r = 11

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 = 11 + 1

Combine like terms: -1 + 1 = 0
0 + -1r = 11 + 1
-1r = 11 + 1

Combine like terms: 11 + 1 = 12
-1r = 12

Divide each side by '-1'.
r = -12

Simplifying
r = -12

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