400=2-3.14-r

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Solution for 400=2-3.14-r equation: 



400=2-3.14-r

We move all terms to the left:

400-(2-3.14-r)=0

We add all the numbers together, and all the variables

-(-1r-1.14)+400=0

We get rid of parentheses

1r+1.14+400=0

We add all the numbers together, and all the variables

r+401.14=0

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

r=-401.14

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