-5(r+9)=-66

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Solution for -5(r+9)=-66 equation: 


Simplifying
-5(r + 9) = -66

Reorder the terms:
-5(9 + r) = -66
(9 * -5 + r * -5) = -66
(-45 + -5r) = -66

Solving
-45 + -5r = -66

Solving for variable 'r'.

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

Add '45' to each side of the equation.
-45 + 45 + -5r = -66 + 45

Combine like terms: -45 + 45 = 0
0 + -5r = -66 + 45
-5r = -66 + 45

Combine like terms: -66 + 45 = -21
-5r = -21

Divide each side by '-5'.
r = 4.2

Simplifying
r = 4.2

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