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-4(2b+10)+b=-49
We move all terms to the left:
-4(2b+10)+b-(-49)=0
We add all the numbers together, and all the variables
b-4(2b+10)+49=0
We multiply parentheses
b-8b-40+49=0
We add all the numbers together, and all the variables
-7b+9=0
We move all terms containing b to the left, all other terms to the right
-7b=-9
b=-9/-7
b=1+2/7
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