r+2.5=-4.2

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Solution for r+2.5=-4.2 equation: 



r+2.5=-4.2

We move all terms to the left:

r+2.5-(-4.2)=0

We add all the numbers together, and all the variables

r+6.7=0

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

r=-6.7

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