4+2.5r=-2

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Solution for 4+2.5r=-2 equation: 



4+2.5r=-2

We move all terms to the left:

4+2.5r-(-2)=0

We add all the numbers together, and all the variables

2.5r+6=0

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

2.5r=-6

r=-6/2.5

r=-2+1/2.5

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