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13=4(b+2)-3
We move all terms to the left:
13-(4(b+2)-3)=0
We calculate terms in parentheses: -(4(b+2)-3), so:We get rid of parentheses
4(b+2)-3
We multiply parentheses
4b+8-3
We add all the numbers together, and all the variables
4b+5
Back to the equation:
-(4b+5)
-4b-5+13=0
We add all the numbers together, and all the variables
-4b+8=0
We move all terms containing b to the left, all other terms to the right
-4b=-8
b=-8/-4
b=+2
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