Question

даю 69 баллов Пожалуйста :)
В 1547 первый ненадо все остальные сделать нужно.

Answer 1

1547
$2) left { {{x-8y-17=0} atop {3x+4y-23=0|*2}} right. \ + left { {{x-8y-17=0} atop {6x+8y-46=0}} right. \ \ left { {{x-8y-17=0} atop {x+6x-8y+8y-46-17=0}} right. \ \ left { {{x-17=8y} atop {7x=63}} right. \ \ left { {{9-17=8y} atop {x=9}} right.\ \ left { {{y=-1} atop {x=9}} right. \ \ OTBET: (9;-1)$

$3) left { {{15x-11y-47=0} atop {5x-y+17=0|*(-3)}} right. \ + left { {{15x-11y-47=0} atop {-15x+3y-51=0}} right. \ \ left { {{15x-15x+3y-11y-51-47=0} atop {5x-y+17=0}} right. \ \ left { {{-8y=98} atop {5x=y-17}} right. \ \ left { {{y=-12,25} atop {5x=-12,25-17}} right. \ \ left { {{y=-12,25} atop {x=-5,85}} right. \ \ OTBET:(-5,85; -12,25)$

$4) left { {{8x-9y-21=0|*3} atop {3x-2y-12=0|*(-8)}} right. \ + left { {{24x-27y-63=0} atop {-24x+16y+96=0}} right. \ \ left { {{24x-24x-27y+16y-63+96=0} atop {3x-2y-12=0}} right. \ \ left { {{-11y=-33} atop {3x=2y+12}} right. \ \ left { {{y=3} atop {3x=6+12}} right. \ \ left { {{y=3} atop {x=6}} right. \ \ OTBET: (6;3)$

1548
$1) left { {{0,2x+15y=9,8|*2} atop {0,75x-10y=-3|*3}} right. \ +left { {{0,4x+30y=19,6} atop {2,25x-30y=-9}} right. \ \ left { {{0,4x+30y+2,25x-30y=19,6-9} atop {0,2x+15y=9,8}} right. \ \ left { {{2,65x=10,6} atop {15y=9,8-0,2x}} right. \ \ left { {{x=4} atop {15y=9,8-0,8}} right. \ \ left { {{x=4} atop {y=0,6}} right. \ \ OTBET: (4; 0,6)$

$2) left { {{0,3x+0,5y=0|*(-4)} atop {0,1x+2y=6,5}} right. \ +left { {{-1,2x-2y=0} atop {0,1x+2y=6,5}} right. \ \ left { {{-1,2x-2y+0,1x+2y=6,5} atop {0,1x+2y=6,5}} right. \ \ left { {{-1,1x=6,5} atop {2y=6,5-0,1x}} right. \ \ left { {{x=- frac{65}{11} } atop {2y=6,5+ frac{65}{110}}} right. \ \ left { {{x=- frac{65}{11} } atop {y= frac{39}{11}}} right. \ \ OTBET: (- frac{65}{11}; frac{39}{11})$

$3) left { {{15x-11y=25} atop {5x-4y=10|*(-3)}} right. \ +left { {{15x-11y=25} atop {-15x+12y=-30}} right. \ \ left { {{15x-15x-11y+12y=25-30} atop {5x-4y=10}} right. \ \ left { {{y=-5} atop {5x+20=10}} right. \ \ left { {{y=-5} atop {x=-2}} right. \ \ OTBET:(-2;-5)$

$4) left { {{0,7x+6y=27,9} atop {1,5x-2y=-14,5|*3}} right. \ +left { {{0,7x+6y=27,9} atop {4,5x-6y=-43,5}} right. \ \ left { {{0,7x+4,5x+6y-6y=27,9-43,5} atop {1,5x-2y=-14,5}} right. \ \ left { {{5,2x=-15,6} atop {2y=1,5x+14,5}} right. \ \ left { {{x=-3} atop {2y=-4,5+14,5}} right. \ \ left { {{x=-3} atop {y=5}} right. \ \ OTBET:(-3;5)$

Answer 2

;)

Answer 3

Рада помочь

Answer 4

ты меня прям выручила :)

Answer 5

отмечю потом как лучший.

Answer 6

:)