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4(7x-1)-4(x+5)=12
We move all terms to the left:
4(7x-1)-4(x+5)-(12)=0
We multiply parentheses
28x-4x-4-20-12=0
We add all the numbers together, and all the variables
24x-36=0
We move all terms containing x to the left, all other terms to the right
24x=36
x=36/24
x=1+1/2
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