5*5*5=3.14*r*r*1.5

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Solution for 5*5*5=3.14*r*r*1.5 equation: 



5*5*5=3.14r*r*1.5

We move all terms to the left:

5*5*5-(3.14r*r*1.5)=0

We add all the numbers together, and all the variables

-(+3.14r*r*1.5)+5*5*5=0

We add all the numbers together, and all the variables

-(+3.14r*r*1.5)+125=0

We get rid of parentheses

-3.14r*r*1.5+125=0

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

-3.14r*r*1.5=-125

r=-125/1

r=-125

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