3r+4r+5r=12

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Solution for 3r+4r+5r=12 equation: 


Simplifying
3r + 4r + 5r = 12

Combine like terms: 3r + 4r = 7r
7r + 5r = 12

Combine like terms: 7r + 5r = 12r
12r = 12

Solving
12r = 12

Solving for variable 'r'.

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

Divide each side by '12'.
r = 1

Simplifying
r = 1

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