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0.52=0.13+0.15+b
We move all terms to the left:
0.52-(0.13+0.15+b)=0
We add all the numbers together, and all the variables
-(b+0.28)+0.52=0
We get rid of parentheses
-b-0.28+0.52=0
We add all the numbers together, and all the variables
-1b+0.24=0
We move all terms containing b to the left, all other terms to the right
-b=-0.24
b=-0.24/-1
b=0.24/1
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