3r+15r=72

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Solution for 3r+15r=72 equation: 


Simplifying
3r + 15r = 72

Combine like terms: 3r + 15r = 18r
18r = 72

Solving
18r = 72

Solving for variable 'r'.

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

Divide each side by '18'.
r = 4

Simplifying
r = 4

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