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-2(b-3)=-4
We move all terms to the left:
-2(b-3)-(-4)=0
We add all the numbers together, and all the variables
-2(b-3)+4=0
We multiply parentheses
-2b+6+4=0
We add all the numbers together, and all the variables
-2b+10=0
We move all terms containing b to the left, all other terms to the right
-2b=-10
b=-10/-2
b=+5
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