b+4/9=3.9

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Solution for b+4/9=3.9 equation: 



b+4/9=3.9

We move all terms to the left:

b+4/9-(3.9)=0

We add all the numbers together, and all the variables

b-3.9+4/9=0

We multiply all the terms by the denominator


b*9+4-(3.9)*9=0

We add all the numbers together, and all the variables

b*9-31.1=0

Wy multiply elements

9b-31.1=0

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

9b=31.1

b=31.1/9

b=3+3.7272727272727/8.1818181818182

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