12r-5r=42

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Solution for 12r-5r=42 equation: 


Simplifying
12r + -5r = 42

Combine like terms: 12r + -5r = 7r
7r = 42

Solving
7r = 42

Solving for variable 'r'.

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

Divide each side by '7'.
r = 6

Simplifying
r = 6

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