9(4-5r)=

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Solution for 9(4-5r)= equation: 


Simplifying
9(4 + -5r) = 0
(4 * 9 + -5r * 9) = 0
(36 + -45r) = 0

Solving
36 + -45r = 0

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 + -45r = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -45r = 0 + -36
-45r = 0 + -36

Combine like terms: 0 + -36 = -36
-45r = -36

Divide each side by '-45'.
r = 0.8

Simplifying
r = 0.8

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