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-14x/21-3x/21=13
We move all terms to the left:
-14x/21-3x/21-(13)=0
We multiply all the terms by the denominator
-14x-3x-13*21=0
We add all the numbers together, and all the variables
-17x-273=0
We move all terms containing x to the left, all other terms to the right
-17x=273
x=273/-17
x=-16+1/17
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