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13b=5.04+b
We move all terms to the left:
13b-(5.04+b)=0
We add all the numbers together, and all the variables
13b-(b+5.04)=0
We get rid of parentheses
13b-b-5.04=0
We add all the numbers together, and all the variables
12b-5.04=0
We move all terms containing b to the left, all other terms to the right
12b=5.04
b=5.04/12
b=4.8461538461538/11.538461538462
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