-108=-8(r+7)-5r

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Solution for -108=-8(r+7)-5r equation:


Simplifying
-108 = -8(r + 7) + -5r

Reorder the terms:
-108 = -8(7 + r) + -5r
-108 = (7 * -8 + r * -8) + -5r
-108 = (-56 + -8r) + -5r

Combine like terms: -8r + -5r = -13r
-108 = -56 + -13r

Solving
-108 = -56 + -13r

Solving for variable 'r'.

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

Add '13r' to each side of the equation.
-108 + 13r = -56 + -13r + 13r

Combine like terms: -13r + 13r = 0
-108 + 13r = -56 + 0
-108 + 13r = -56

Add '108' to each side of the equation.
-108 + 108 + 13r = -56 + 108

Combine like terms: -108 + 108 = 0
0 + 13r = -56 + 108
13r = -56 + 108

Combine like terms: -56 + 108 = 52
13r = 52

Divide each side by '13'.
r = 4

Simplifying
r = 4

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