2(3r+4)=4r+20

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Solution for 2(3r+4)=4r+20 equation: 


Simplifying
2(3r + 4) = 4r + 20

Reorder the terms:
2(4 + 3r) = 4r + 20
(4 * 2 + 3r * 2) = 4r + 20
(8 + 6r) = 4r + 20

Reorder the terms:
8 + 6r = 20 + 4r

Solving
8 + 6r = 20 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
8 + 6r + -4r = 20 + 4r + -4r

Combine like terms: 6r + -4r = 2r
8 + 2r = 20 + 4r + -4r

Combine like terms: 4r + -4r = 0
8 + 2r = 20 + 0
8 + 2r = 20

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

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

Combine like terms: 20 + -8 = 12
2r = 12

Divide each side by '2'.
r = 6

Simplifying
r = 6

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