3+5r=-7

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Solution for 3+5r=-7 equation: 



3+5r=-7

We move all terms to the left:

3+5r-(-7)=0

We add all the numbers together, and all the variables

5r+10=0

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

5r=-10

r=-10/5

r=-2

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