-(-2r-3)=9

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Solution for -(-2r-3)=9 equation: 


Simplifying
-1(-2r + -3) = 9

Reorder the terms:
-1(-3 + -2r) = 9
(-3 * -1 + -2r * -1) = 9
(3 + 2r) = 9

Solving
3 + 2r = 9

Solving for variable 'r'.

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

Add '-3' to each side of the equation.
3 + -3 + 2r = 9 + -3

Combine like terms: 3 + -3 = 0
0 + 2r = 9 + -3
2r = 9 + -3

Combine like terms: 9 + -3 = 6
2r = 6

Divide each side by '2'.
r = 3

Simplifying
r = 3

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