768*3.14=1024*3.14-16*3.14r^2

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Solution for 768*3.14=1024*3.14-16*3.14r^2 equation: 



768*3.14=1024*3.14-16*3.14r^2

We move all terms to the left:

768*3.14-(1024*3.14-16*3.14r^2)=0

We add all the numbers together, and all the variables

-(1024*3.14-16*3.14r^2)+2411.52=0

We get rid of parentheses

16*3.14r^2+2411.52-1024*3.14=0

We add all the numbers together, and all the variables

16*3.14r^2-803.84=0

Wy multiply elements

48r-803.84=0

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

48r=803.84

r=803.84/48

r=16+19.478260869565/26.086956521739

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