7-r=2.5

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Solution for 7-r=2.5 equation: 



7-r=2.5

We move all terms to the left:

7-r-(2.5)=0

We add all the numbers together, and all the variables

-1r+4.5=0

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

-r=-4.5

r=-4.5/-1

r=4+0.5/1

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