12r-10r+r-2r+2r=18

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Solution for 12r-10r+r-2r+2r=18 equation: 


Simplifying
12r + -10r + r + -2r + 2r = 18

Combine like terms: 12r + -10r = 2r
2r + r + -2r + 2r = 18

Combine like terms: 2r + r = 3r
3r + -2r + 2r = 18

Combine like terms: 3r + -2r = 1r
1r + 2r = 18

Combine like terms: 1r + 2r = 3r
3r = 18

Solving
3r = 18

Solving for variable 'r'.

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

Divide each side by '3'.
r = 6

Simplifying
r = 6

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