0.25r=-4

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Solution for 0.25r=-4 equation: 



0.25r=-4

We move all terms to the left:

0.25r-(-4)=0

We add all the numbers together, and all the variables

0.25r+4=0

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

0.25r=-4

r=-4/0.25

r=-16

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