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5b-3=3(b+7)+3b
We move all terms to the left:
5b-3-(3(b+7)+3b)=0
We calculate terms in parentheses: -(3(b+7)+3b), so:We get rid of parentheses
3(b+7)+3b
We add all the numbers together, and all the variables
3b+3(b+7)
We multiply parentheses
3b+3b+21
We add all the numbers together, and all the variables
6b+21
Back to the equation:
-(6b+21)
5b-6b-21-3=0
We add all the numbers together, and all the variables
-1b-24=0
We move all terms containing b to the left, all other terms to the right
-b=24
b=24/-1
b=-24
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