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19=3(b+4)+1
We move all terms to the left:
19-(3(b+4)+1)=0
We calculate terms in parentheses: -(3(b+4)+1), so:We get rid of parentheses
3(b+4)+1
We multiply parentheses
3b+12+1
We add all the numbers together, and all the variables
3b+13
Back to the equation:
-(3b+13)
-3b-13+19=0
We add all the numbers together, and all the variables
-3b+6=0
We move all terms containing b to the left, all other terms to the right
-3b=-6
b=-6/-3
b=+2
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