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2000b+100=1800b+150
We move all terms to the left:
2000b+100-(1800b+150)=0
We get rid of parentheses
2000b-1800b-150+100=0
We add all the numbers together, and all the variables
200b-50=0
We move all terms containing b to the left, all other terms to the right
200b=50
b=50/200
b=1/4
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