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11-15b=-5-18b-11
We move all terms to the left:
11-15b-(-5-18b-11)=0
We add all the numbers together, and all the variables
-15b-(-18b-16)+11=0
We get rid of parentheses
-15b+18b+16+11=0
We add all the numbers together, and all the variables
3b+27=0
We move all terms containing b to the left, all other terms to the right
3b=-27
b=-27/3
b=-9
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