r*3.14*2=75.4

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Solution for r*3.14*2=75.4 equation: 



r*3.14*2=75.4

We move all terms to the left:

r*3.14*2-(75.4)=0

We add all the numbers together, and all the variables

r*3.14*2-75.4=0

Wy multiply elements

6.28r-75.4=0

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

6.28r=75.4

r=75.4/6.28

r=12+0.040000000000006/6.28

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