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4.500-b=-3b
We move all terms to the left:
4.500-b-(-3b)=0
We add all the numbers together, and all the variables
-1b-(-3b)+4.5=0
We get rid of parentheses
-1b+3b+4.5=0
We add all the numbers together, and all the variables
2b+4.5=0
We move all terms containing b to the left, all other terms to the right
2b=-4.5
b=-4.5/2
b=-2+0.5/2
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