solve 2x-3y plus 2 equals x plus 2y minus 5 equals 3x plus y?

Answer 1

I suppose that means
2x-3y+2 = x+2y-5
x+2y-5 = 3x+y
or, rearranging things into a more standard form,
x-5y = -7
2x-y = -5
now, since y = 2x+5,
x-5(2x+5) = -7
-9x-25 = -7
x = -2
so, y = 2*-2 + 5 = 1