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56=-4(-2-3b)
We move all terms to the left:
56-(-4(-2-3b))=0
We add all the numbers together, and all the variables
-(-4(-3b-2))+56=0
We calculate terms in parentheses: -(-4(-3b-2)), so:We get rid of parentheses
-4(-3b-2)
We multiply parentheses
12b+8
Back to the equation:
-(12b+8)
-12b-8+56=0
We add all the numbers together, and all the variables
-12b+48=0
We move all terms containing b to the left, all other terms to the right
-12b=-48
b=-48/-12
b=+4
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