r=64/400*4

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Solution for r=64/400*4 equation: 



r=64/400*4

We move all terms to the left:

r-(64/400*4)=0

We add all the numbers together, and all the variables

r-(+64/400*4)=0

We get rid of parentheses

r-64/400*4=0

We multiply all the terms by the denominator


r*400*4-64=0

Wy multiply elements

1600r*4-64=0

Wy multiply elements

6400r-64=0

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

6400r=64

r=64/6400

r=1/100

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