x+(2r)+(6r)=18

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Solution for x+(2r)+(6r)=18 equation: 


Simplifying
x + (2r) + (6r) = 18

Reorder the terms:
(2r) + (6r) + x = 18

Combine like terms: (2r) + (6r) = 8r
8r + x = 18

Solving
8r + x = 18

Solving for variable 'r'.

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

Add '-1x' to each side of the equation.
8r + x + -1x = 18 + -1x

Combine like terms: x + -1x = 0
8r + 0 = 18 + -1x
8r = 18 + -1x

Divide each side by '8'.
r = 2.25 + -0.125x

Simplifying
r = 2.25 + -0.125x

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