-5=.25(4+20r)-8r

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Solution for -5=.25(4+20r)-8r equation:


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

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

Solving
-5 = 1 + -3r

Solving for variable 'r'.

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

Add '3r' to each side of the equation.
-5 + 3r = 1 + -3r + 3r

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

Add '5' to each side of the equation.
-5 + 5 + 3r = 1 + 5

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

Combine like terms: 1 + 5 = 6
3r = 6

Divide each side by '3'.
r = 2

Simplifying
r = 2

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