2(1+4r)=-20

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Solution for 2(1+4r)=-20 equation: 


Simplifying
2(1 + 4r) = -20
(1 * 2 + 4r * 2) = -20
(2 + 8r) = -20

Solving
2 + 8r = -20

Solving for variable 'r'.

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

Add '-2' to each side of the equation.
2 + -2 + 8r = -20 + -2

Combine like terms: 2 + -2 = 0
0 + 8r = -20 + -2
8r = -20 + -2

Combine like terms: -20 + -2 = -22
8r = -22

Divide each side by '8'.
r = -2.75

Simplifying
r = -2.75

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