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-6(1+3b)=-150
We move all terms to the left:
-6(1+3b)-(-150)=0
We add all the numbers together, and all the variables
-6(3b+1)-(-150)=0
We add all the numbers together, and all the variables
-6(3b+1)+150=0
We multiply parentheses
-18b-6+150=0
We add all the numbers together, and all the variables
-18b+144=0
We move all terms containing b to the left, all other terms to the right
-18b=-144
b=-144/-18
b=+8
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