4=r/2.5

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Solution for 4=r/2.5 equation: 



4=r/2.5

We move all terms to the left:

4-(r/2.5)=0

We add all the numbers together, and all the variables

-(+r/2.5)+4=0

We get rid of parentheses

-r/2.5+4=0

We multiply all the terms by the denominator


-r+4*2.5=0

We add all the numbers together, and all the variables

-1r+10=0

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

-r=-10

r=-10/-1

r=+10

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