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make the second equation, x+2y = -3, into x = -3-2y and substitute -3-2y into the first equation, 9x-5y. then, you will get 9(-3-2y)-5y = -30. that should simplify to -27 - 18y - 5y = -30. That should simplify to -27 - 23y = -30. that simplifies to -23y =
