3r=12-9

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Solution for 3r=12-9 equation: 


Simplifying
3r = 12 + -9

Combine like terms: 12 + -9 = 3
3r = 3

Solving
3r = 3

Solving for variable 'r'.

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

Divide each side by '3'.
r = 1

Simplifying
r = 1

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