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6x+5x/3=399
We move all terms to the left:
6x+5x/3-(399)=0
We multiply all the terms by the denominator
6x*3+5x-399*3=0
We add all the numbers together, and all the variables
5x+6x*3-1197=0
Wy multiply elements
5x+18x-1197=0
We add all the numbers together, and all the variables
23x-1197=0
We move all terms containing x to the left, all other terms to the right
23x=1197
x=1197/23
x=52+1/23
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