55.7(1.3r)=400

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Solution for 55.7(1.3r)=400 equation: 



55.7(1.3r)=400

We move all terms to the left:

55.7(1.3r)-(400)=0

We add all the numbers together, and all the variables

55.7(+1.3r)-400=0

We multiply parentheses

55.7r-400=0

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

55.7r=400

r=400/55.7

r=7+1.9803921568628/10.921568627451

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