4(r+9)+4r=108

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Solution for 4(r+9)+4r=108 equation:


Simplifying
4(r + 9) + 4r = 108

Reorder the terms:
4(9 + r) + 4r = 108
(9 * 4 + r * 4) + 4r = 108
(36 + 4r) + 4r = 108

Combine like terms: 4r + 4r = 8r
36 + 8r = 108

Solving
36 + 8r = 108

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 + 8r = 108 + -36

Combine like terms: 36 + -36 = 0
0 + 8r = 108 + -36
8r = 108 + -36

Combine like terms: 108 + -36 = 72
8r = 72

Divide each side by '8'.
r = 9

Simplifying
r = 9

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