8r-6r+2r-4r+2r=18

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Solution for 8r-6r+2r-4r+2r=18 equation: 


Simplifying
8r + -6r + 2r + -4r + 2r = 18

Combine like terms: 8r + -6r = 2r
2r + 2r + -4r + 2r = 18

Combine like terms: 2r + 2r = 4r
4r + -4r + 2r = 18

Combine like terms: 4r + -4r = 0
0 + 2r = 18
2r = 18

Solving
2r = 18

Solving for variable 'r'.

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

Divide each side by '2'.
r = 9

Simplifying
r = 9

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