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19b-15=15+17b
We move all terms to the left:
19b-15-(15+17b)=0
We add all the numbers together, and all the variables
19b-(17b+15)-15=0
We get rid of parentheses
19b-17b-15-15=0
We add all the numbers together, and all the variables
2b-30=0
We move all terms containing b to the left, all other terms to the right
2b=30
b=30/2
b=15
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