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-15.9b+19.69+12.6b=-4.31-10.8b
We move all terms to the left:
-15.9b+19.69+12.6b-(-4.31-10.8b)=0
We add all the numbers together, and all the variables
-15.9b+12.6b-(-10.8b-4.31)+19.69=0
We add all the numbers together, and all the variables
-3.3b-(-10.8b-4.31)+19.69=0
We get rid of parentheses
-3.3b+10.8b+4.31+19.69=0
We add all the numbers together, and all the variables
7.5b+24=0
We move all terms containing b to the left, all other terms to the right
7.5b=-24
b=-24/7.5
b=-3+1/5
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