7r-9=-86

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Solution for 7r-9=-86 equation: 


Simplifying
7r + -9 = -86

Reorder the terms:
-9 + 7r = -86

Solving
-9 + 7r = -86

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + 7r = -86 + 9

Combine like terms: -9 + 9 = 0
0 + 7r = -86 + 9
7r = -86 + 9

Combine like terms: -86 + 9 = -77
7r = -77

Divide each side by '7'.
r = -11

Simplifying
r = -11

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