-1=r-1

Solution for -1=r-1 equation:

Simplifying
-1 = r + -1

Reorder the terms:
-1 = -1 + r

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

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

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

Solving
0 = 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 = r + -1r
Remove the zero:
-1r = r + -1r

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

Divide each side by '-1'.
r = 0

Simplifying
r = 0