2(5+2r)=18

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Solution for 2(5+2r)=18 equation: 


Simplifying
2(5 + 2r) = 18
(5 * 2 + 2r * 2) = 18
(10 + 4r) = 18

Solving
10 + 4r = 18

Solving for variable 'r'.

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

Add '-10' to each side of the equation.
10 + -10 + 4r = 18 + -10

Combine like terms: 10 + -10 = 0
0 + 4r = 18 + -10
4r = 18 + -10

Combine like terms: 18 + -10 = 8
4r = 8

Divide each side by '4'.
r = 2

Simplifying
r = 2

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