3r+12r=30

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Solution for 3r+12r=30 equation: 


Simplifying
3r + 12r = 30

Combine like terms: 3r + 12r = 15r
15r = 30

Solving
15r = 30

Solving for variable 'r'.

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

Divide each side by '15'.
r = 2

Simplifying
r = 2

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