Я гуль.
1000-7=993
993-7=986
986-7=979
979-7=972
972-7=965
965-7=958
958-7=951
951-7=944
944-7=937
937-7=930
930-7=923
923-7=916
916-7=909
909-7=902
902-7=895
895-7=888
888-7=881
881-7=874
874-7=867
867-7=860
860-7=853
853-7=846
846-7=839
839-7=832
832-7=825
825-7=818
818-7=811
811-7=804
804-7=797
797-7=790
790-7=783
783-7=776
776-7=769
769-7=762
762-7=755
755-7=748
741-7=734
734-7=727
727-7=720
720-7=713
713-7=706
706-7=699
699-7=692
692-7=685
685-7=657
657-7=650
650-7=643
643-7=636
636-7=629
629-7=622
622-7=615
615-7=608
608-7=601
601-7=594
594-7=587
587-7=580
580-7=573
573-7=566
566-7=559
559-7=552
552-7=545
545-7=538
538-7=531
531-7=524
524-7=517
517-7=510
510-7=503
503-7=496
496-7=489
489-7=482
482-7=475
475-7=468
468-7=461
461-7=454
454-7=447
447-7=440
440-7=433
433-7=426
426-7=419
419-7=412
412-7=405
405-7=398
398-7=391
391-7=384
384-7=377
377-7=370
370-7=363
363-7=356
356-7=349
349-7=342
342-7=321
321-7=314
314-7=307
307-7=300
300-7=293
293-7=286
286-7=279
279-7=272
272-7=265
265-7=258
258-7=251
251-7=244
244-7=237
237-7=230
230-7=223
223-7=216
216-7=209
209-7=202
202-7=195
195-7=188
188-7=181
181-7=174
174-7=167
167-7=160
160-7=153
153-7=146
146-7=139
139-7=132
132-7=125
125-7=118
118-7=111
111-7=104
104-7=97
97-7=90
90-7=83
83-7=76
76-7=69
69-7=62
62-7=55
55-7=48
48-7=41
41-7=34
34-7=27
27-7=20
20-7=13
13-7=6
6-7=-1
Я гуль.
1000-7=993
993-7=986
986-7=979
979-7=972
972-7=965
965-7=958
958-7=951
951-7=944
944-7=937
937-7=930
930-7=923
923-7=916
916-7=909
909-7=902
902-7=895
895-7=888
888-7=881
881-7=874
874-7=867
867-7=860
860-7=853
853-7=846
846-7=839
839-7=832
832-7=825
825-7=818
818-7=811
811-7=804
804-7=797
797-7=790
790-7=783
783-7=776
776-7=769
769-7=762
762-7=755
755-7=748
741-7=734
734-7=727
727-7=720
720-7=713
713-7=706
706-7=699
699-7=692
692-7=685
685-7=657
657-7=650
650-7=643
643-7=636
636-7=629
629-7=622
622-7=615
615-7=608
608-7=601
601-7=594
594-7=587
587-7=580
580-7=573
573-7=566
566-7=559
559-7=552
552-7=545
545-7=538
538-7=531
531-7=524
524-7=517
517-7=510
510-7=503
503-7=496
496-7=489
489-7=482
482-7=475
475-7=468
468-7=461
461-7=454
454-7=447
447-7=440
440-7=433
433-7=426
426-7=419
419-7=412
412-7=405
405-7=398
398-7=391
391-7=384
384-7=377
377-7=370
370-7=363
363-7=356
356-7=349
349-7=342
342-7=321
321-7=314
314-7=307
307-7=300
300-7=293
293-7=286
286-7=279
279-7=272
272-7=265
265-7=258
258-7=251
251-7=244
244-7=237
237-7=230
230-7=223
223-7=216
216-7=209
209-7=202
202-7=195
195-7=188
188-7=181
181-7=174
174-7=167
167-7=160
160-7=153
153-7=146
146-7=139
139-7=132
132-7=125
125-7=118
118-7=111
111-7=104
104-7=97
97-7=90
90-7=83
83-7=76
76-7=69
69-7=62
62-7=55
55-7=48
48-7=41
41-7=34
34-7=27
27-7=20
20-7=13
13-7=6
6-7=-1
{3х+у=8
3x + 2x-2 =8
5x=8+2
5x=10
x=2
y=2*2 -2 = 4
ответ : (2;2)
{4х-3у=3 ⇒ y= (4x-3)/3
{4х-7у=-5
4x - 7/1 * (4x-3)/3 = -5
4x- ( 7(4x-3)/3) = -5 |×3
12 x - 7 (4x-3) = -15
12x - 28x + 21=-15
- 16x = - 36
x= (-36) / (-16) = 9/4
x= 2.25
y= ( 4*2.25-3) /3 = 6/3=2
ответ: (2,25 ; 2)
{7x+3y=-1 ⇒ x= (-1-3y)/7
{3x - 7y= 17
3(-1-3y) /7 - 7y =17 |×7
3(-1-3y) -49y= 119
-3 -9y-49y=119
-58y=119+3
y= 122/(-58) = - 61/29
y= - 2 3/29
x= (-1 - 3/1 * (-61/29) ) /7 = (-29/29 + 183/29 )/7 =
= 154/29 * 1/7= 22/29
ответ: ( 22/29 ; -2 3/29 )