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3b+-7=65-9b
We move all terms to the left:
3b+-7-(65-9b)=0
We add all the numbers together, and all the variables
3b-(-9b+65)-7+=0
We add all the numbers together, and all the variables
3b-(-9b+65)=0
We get rid of parentheses
3b+9b-65=0
We add all the numbers together, and all the variables
12b-65=0
We move all terms containing b to the left, all other terms to the right
12b=65
b=65/12
b=5+5/12
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