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-1.2=-8.5+b
We move all terms to the left:
-1.2-(-8.5+b)=0
We add all the numbers together, and all the variables
-(b-8.5)-1.2=0
We get rid of parentheses
-b+8.5-1.2=0
We add all the numbers together, and all the variables
-1b+7.3=0
We move all terms containing b to the left, all other terms to the right
-b=-7.3
b=-7.3/-1
b=7+0.3/1
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