4(1-8r)=-20

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Solution for 4(1-8r)=-20 equation: 


Simplifying
4(1 + -8r) = -20
(1 * 4 + -8r * 4) = -20
(4 + -32r) = -20

Solving
4 + -32r = -20

Solving for variable 'r'.

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

Add '-4' to each side of the equation.
4 + -4 + -32r = -20 + -4

Combine like terms: 4 + -4 = 0
0 + -32r = -20 + -4
-32r = -20 + -4

Combine like terms: -20 + -4 = -24
-32r = -24

Divide each side by '-32'.
r = 0.75

Simplifying
r = 0.75

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