3r-r-2r+2r=12

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Solution for 3r-r-2r+2r=12 equation: 


Simplifying
3r + -1r + -2r + 2r = 12

Combine like terms: 3r + -1r = 2r
2r + -2r + 2r = 12

Combine like terms: 2r + -2r = 0
0 + 2r = 12
2r = 12

Solving
2r = 12

Solving for variable 'r'.

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

Divide each side by '2'.
r = 6

Simplifying
r = 6

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