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7х 4х. -5х+7у=2 8х+7у=15. (8х + 7) *5. У 5х-8/5х2-8х. (2х+8)(х+5)/(х-7).
-5х+7у=2 8х+7у=15. (8х + 7) *5. У 5х-8/5х2-8х. (2х+8)(х+5)/(х-7).

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