.5r+7=12

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Solution for .5r+7=12 equation: 



.5r+7=12

We move all terms to the left:

.5r+7-(12)=0

We add all the numbers together, and all the variables

.5r-5=0

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

.5r=5

r=5/.5

r=10

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