(1, 4), (8, -3), (4, 2) 6. х-2у <12, 5. 7x-ys21, (3, 3) 7. 6т - 2y < 12, (3,6) 8. 5x-4y > 88, (4, 2), (3, -2). (1, 4) 9. З -4y S 15, (3,4), (3,6), 10. 5х + 2y S15, (1, 0), (3, 4), (-3, -4) (3, 3)

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