8r-1=31

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Solution for 8r-1=31 equation: 


Simplifying
8r + -1 = 31

Reorder the terms:
-1 + 8r = 31

Solving
-1 + 8r = 31

Solving for variable 'r'.

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

Add '1' to each side of the equation.
-1 + 1 + 8r = 31 + 1

Combine like terms: -1 + 1 = 0
0 + 8r = 31 + 1
8r = 31 + 1

Combine like terms: 31 + 1 = 32
8r = 32

Divide each side by '8'.
r = 4

Simplifying
r = 4

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