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2(x+68)+4x=684
We move all terms to the left:
2(x+68)+4x-(684)=0
We add all the numbers together, and all the variables
4x+2(x+68)-684=0
We multiply parentheses
4x+2x+136-684=0
We add all the numbers together, and all the variables
6x-548=0
We move all terms containing x to the left, all other terms to the right
6x=548
x=548/6
x=91+1/3
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