3r+7=4

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Solution for 3r+7=4 equation: 



3r+7=4

We move all terms to the left:

3r+7-(4)=0

We add all the numbers together, and all the variables

3r+3=0

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

3r=-3

r=-3/3

r=-1

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