-9(r-4)=

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


Simplifying
-9(r + -4) = 0

Reorder the terms:
-9(-4 + r) = 0
(-4 * -9 + r * -9) = 0
(36 + -9r) = 0

Solving
36 + -9r = 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 + -9r = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -9r = 0 + -36
-9r = 0 + -36

Combine like terms: 0 + -36 = -36
-9r = -36

Divide each side by '-9'.
r = 4

Simplifying
r = 4

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