-9(r-1)=

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Solution for -9(r-1)= equation: 


Simplifying
-9(r + -1) = 0

Reorder the terms:
-9(-1 + r) = 0
(-1 * -9 + r * -9) = 0
(9 + -9r) = 0

Solving
9 + -9r = 0

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + -9r = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -9r = 0 + -9
-9r = 0 + -9

Combine like terms: 0 + -9 = -9
-9r = -9

Divide each side by '-9'.
r = 1

Simplifying
r = 1

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