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3x-5(-4x-19)=-20
We move all terms to the left:
3x-5(-4x-19)-(-20)=0
We add all the numbers together, and all the variables
3x-5(-4x-19)+20=0
We multiply parentheses
3x+20x+95+20=0
We add all the numbers together, and all the variables
23x+115=0
We move all terms containing x to the left, all other terms to the right
23x=-115
x=-115/23
x=-5
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