4(r+9)=

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Solution for 4(r+9)= equation: 


Simplifying
4(r + 9) = 0

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

Solving
36 + 4r = 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 + 4r = 0 + -36

Combine like terms: 36 + -36 = 0
0 + 4r = 0 + -36
4r = 0 + -36

Combine like terms: 0 + -36 = -36
4r = -36

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

Simplifying
r = -9

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