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4(5x+2)=-128
We move all terms to the left:
4(5x+2)-(-128)=0
We add all the numbers together, and all the variables
4(5x+2)+128=0
We multiply parentheses
20x+8+128=0
We add all the numbers together, and all the variables
20x+136=0
We move all terms containing x to the left, all other terms to the right
20x=-136
x=-136/20
x=-6+4/5
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