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4(3x-4)=687
We move all terms to the left:
4(3x-4)-(687)=0
We multiply parentheses
12x-16-687=0
We add all the numbers together, and all the variables
12x-703=0
We move all terms containing x to the left, all other terms to the right
12x=703
x=703/12
x=58+7/12
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