8r+13r=42

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Solution for 8r+13r=42 equation: 


Simplifying
8r + 13r = 42

Combine like terms: 8r + 13r = 21r
21r = 42

Solving
21r = 42

Solving for variable 'r'.

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

Divide each side by '21'.
r = 2

Simplifying
r = 2

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