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-5(x+13)=-105
We move all terms to the left:
-5(x+13)-(-105)=0
We add all the numbers together, and all the variables
-5(x+13)+105=0
We multiply parentheses
-5x-65+105=0
We add all the numbers together, and all the variables
-5x+40=0
We move all terms containing x to the left, all other terms to the right
-5x=-40
x=-40/-5
x=+8
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