12=-4+5b-9b

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Solution for 12=-4+5b-9b equation:



12=-4+5b-9b
We move all terms to the left:
12-(-4+5b-9b)=0
We add all the numbers together, and all the variables
-(-4b-4)+12=0
We get rid of parentheses
4b+4+12=0
We add all the numbers together, and all the variables
4b+16=0
We move all terms containing b to the left, all other terms to the right
4b=-16
b=-16/4
b=-4

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