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13b+3=9.5
We move all terms to the left:
13b+3-(9.5)=0
We add all the numbers together, and all the variables
13b-6.5=0
We move all terms containing b to the left, all other terms to the right
13b=6.5
b=6.5/13
b=4.33333333333/8.66666666667
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