6(6-3r)=-90

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Solution for 6(6-3r)=-90 equation: 


Simplifying
6(6 + -3r) = -90
(6 * 6 + -3r * 6) = -90
(36 + -18r) = -90

Solving
36 + -18r = -90

Solving for variable 'r'.

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

Add '-36' to each side of the equation.
36 + -36 + -18r = -90 + -36

Combine like terms: 36 + -36 = 0
0 + -18r = -90 + -36
-18r = -90 + -36

Combine like terms: -90 + -36 = -126
-18r = -126

Divide each side by '-18'.
r = 7

Simplifying
r = 7

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