2r+8=-1

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Solution for 2r+8=-1 equation: 


Simplifying
2r + 8 = -1

Reorder the terms:
8 + 2r = -1

Solving
8 + 2r = -1

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 2r = -1 + -8

Combine like terms: 8 + -8 = 0
0 + 2r = -1 + -8
2r = -1 + -8

Combine like terms: -1 + -8 = -9
2r = -9

Divide each side by '2'.
r = -4.5

Simplifying
r = -4.5

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