3r-4+8r+5=

Solution for 3r-4+8r+5= equation:

Simplifying
3r + -4 + 8r + 5 = 0

Reorder the terms:
-4 + 5 + 3r + 8r = 0

Combine like terms: -4 + 5 = 1
1 + 3r + 8r = 0

Combine like terms: 3r + 8r = 11r
1 + 11r = 0

Solving
1 + 11r = 0

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 + 11r = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 11r = 0 + -1
11r = 0 + -1

Combine like terms: 0 + -1 = -1
11r = -1

Divide each side by '11'.
r = -0.09090909091

Simplifying
r = -0.09090909091