8r-4r=12

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Solution for 8r-4r=12 equation: 


Simplifying
8r + -4r = 12

Combine like terms: 8r + -4r = 4r
4r = 12

Solving
4r = 12

Solving for variable 'r'.

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

Divide each side by '4'.
r = 3

Simplifying
r = 3

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