42-6r=12

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Solution for 42-6r=12 equation: 



42-6r=12

We move all terms to the left:

42-6r-(12)=0

We add all the numbers together, and all the variables

-6r+30=0

We move all terms containing r to the left, all other terms to the right

-6r=-30

r=-30/-6

r=+5

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