2r-1+5r=-8

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Solution for 2r-1+5r=-8 equation: 


Simplifying
2r + -1 + 5r = -8

Reorder the terms:
-1 + 2r + 5r = -8

Combine like terms: 2r + 5r = 7r
-1 + 7r = -8

Solving
-1 + 7r = -8

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 + 7r = -8 + 1

Combine like terms: -1 + 1 = 0
0 + 7r = -8 + 1
7r = -8 + 1

Combine like terms: -8 + 1 = -7
7r = -7

Divide each side by '7'.
r = -1

Simplifying
r = -1

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