9(8+7r)=-15

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Solution for 9(8+7r)=-15 equation: 


Simplifying
9(8 + 7r) = -15
(8 * 9 + 7r * 9) = -15
(72 + 63r) = -15

Solving
72 + 63r = -15

Solving for variable 'r'.

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

Add '-72' to each side of the equation.
72 + -72 + 63r = -15 + -72

Combine like terms: 72 + -72 = 0
0 + 63r = -15 + -72
63r = -15 + -72

Combine like terms: -15 + -72 = -87
63r = -87

Divide each side by '63'.
r = -1.380952381

Simplifying
r = -1.380952381

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