if you want to solve the system, then I suggest substitution (after you have fixed your typos)
Since y = 5x-2, use that in the other equation (which I'm guessing is 6x+3y=6), and you have
6x+3(5x-2) = 6
Solve that for x, and then you can get y.
Of course, I may have gotten your garbled post all wrong ...
Y=5x-2 6x+3y-6
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