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5-8b=-9b+2b-4
We move all terms to the left:
5-8b-(-9b+2b-4)=0
We add all the numbers together, and all the variables
-8b-(-7b-4)+5=0
We get rid of parentheses
-8b+7b+4+5=0
We add all the numbers together, and all the variables
-1b+9=0
We move all terms containing b to the left, all other terms to the right
-b=-9
b=-9/-1
b=+9
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