1r+8.2-0.4r=-8.6

Solution for 1r+8.2-0.4r=-8.6 equation:

Simplifying
1r + 8.2 + -0.4r = -8.6

Reorder the terms:
8.2 + 1r + -0.4r = -8.6

Combine like terms: 1r + -0.4r = 0.6r
8.2 + 0.6r = -8.6

Solving
8.2 + 0.6r = -8.6

Solving for variable 'r'.

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

Add '-8.2' to each side of the equation.
8.2 + -8.2 + 0.6r = -8.6 + -8.2

Combine like terms: 8.2 + -8.2 = 0.0
0.0 + 0.6r = -8.6 + -8.2
0.6r = -8.6 + -8.2

Combine like terms: -8.6 + -8.2 = -16.8
0.6r = -16.8

Divide each side by '0.6'.
r = -28

Simplifying
r = -28