8r-(20r+4)0.25=-5

Solution for 8r-(20r+4)0.25=-5 equation:

Simplifying
8r + -1(20r + 4) * 0.25 = -5

Reorder the terms:
8r + -1(4 + 20r) * 0.25 = -5

Reorder the terms for easier multiplication:
8r + -1 * 0.25(4 + 20r) = -5

Multiply -1 * 0.25
8r + -0.25(4 + 20r) = -5
8r + (4 * -0.25 + 20r * -0.25) = -5
8r + (-1 + -5r) = -5

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

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

Solving
-1 + 3r = -5

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 + 3r = -5 + 1

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

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

Divide each side by '3'.
r = -1.333333333

Simplifying
r = -1.333333333