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40=-4(3b-10)+12b
We move all terms to the left:
40-(-4(3b-10)+12b)=0
We calculate terms in parentheses: -(-4(3b-10)+12b), so:We add all the numbers together, and all the variables
-4(3b-10)+12b
We add all the numbers together, and all the variables
12b-4(3b-10)
We multiply parentheses
12b-12b+40
We add all the numbers together, and all the variables
40
Back to the equation:
-(40)
=0
b=0/1
b=0
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