2(4+2r)=20

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


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

Solving
8 + 4r = 20

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + 4r = 20 + -8

Combine like terms: 8 + -8 = 0
0 + 4r = 20 + -8
4r = 20 + -8

Combine like terms: 20 + -8 = 12
4r = 12

Divide each side by '4'.
r = 3

Simplifying
r = 3

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