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18=393x-69
We move all terms to the left:
18-(393x-69)=0
We get rid of parentheses
-393x+69+18=0
We add all the numbers together, and all the variables
-393x+87=0
We move all terms containing x to the left, all other terms to the right
-393x=-87
x=-87/-393
x=29/131
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