8-2r=-1

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Solution for 8-2r=-1 equation: 


Simplifying
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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