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2x-4(-4x-13)=128
We move all terms to the left:
2x-4(-4x-13)-(128)=0
We multiply parentheses
2x+16x+52-128=0
We add all the numbers together, and all the variables
18x-76=0
We move all terms containing x to the left, all other terms to the right
18x=76
x=76/18
x=4+2/9
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