-3(6-r)=9

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Solution for -3(6-r)=9 equation: 


Simplifying
-3(6 + -1r) = 9
(6 * -3 + -1r * -3) = 9
(-18 + 3r) = 9

Solving
-18 + 3r = 9

Solving for variable 'r'.

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

Add '18' to each side of the equation.
-18 + 18 + 3r = 9 + 18

Combine like terms: -18 + 18 = 0
0 + 3r = 9 + 18
3r = 9 + 18

Combine like terms: 9 + 18 = 27
3r = 27

Divide each side by '3'.
r = 9

Simplifying
r = 9

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