3y-8+5y = 2y-39
3y+5y-2y = -39+8
6y = -31
y = -31/6
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You cant solve it unless it is an equation. To be an equation it must have an equals sign.
If you mean -2x+y = 8 then y = 2x+8 as a straight line equation
2x-y8 where x is 6: xy=8-2=6
Unfortunately, limitations of the browser used by Answers.com means that we cannot see most symbols. It is therefore impossible to give a proper answer to your question. Please resubmit your question spelling out the symbols as "plus", "minus", "times", "equals".
If you mean: x+y = 8 and -x+2y = 7 then they are simultaneous equations whose solutions are x = 3 and y = 5