Language: C

#include<stdio.h>

typedef struct _Node{
  int a,b,c,d,e,f;
  double x,y;
  struct _Node *next
}Node

int main(){
  Node *head,*p;
  p=malloc(sizeof(Node));
  head=p;
  while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
    p->next=malloc(sizeof(Node));
    p=p->next;  
  }
  p->next=NULL;
  p=head;
  while(p!=NULL){
    p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
    p->y=c-(a*x);
    printf("%.3f %.3f\n",p->x,p->y);
    p=p->next;      
  }
  return 0;
}

Compiler output:
main.c:7:1: warning: no semicolon at end of struct or union
    7 | }Node
      | ^
main.c:7:6: error: expected ';' before 'int'
    7 | }Node
      |      ^
      |      ;
    8 | 
    9 | int main(){
      | ~~~   
main.c: In function 'main':
main.c:10:3: error: unknown type name 'Node'
   10 |   Node *head,*p;
      |   ^~~~
main.c:11:5: error: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
   11 |   p=malloc(sizeof(Node));
      |     ^~~~~~
main.c:2:1: note: include '<stdlib.h>' or provide a declaration of 'malloc'
    1 | #include<stdio.h>
  +++ |+#include <stdlib.h>
    2 | 
main.c:11:5: warning: incompatible implicit declaration of built-in function 'malloc' [-Wbuiltin-declaration-mismatch]
   11 |   p=malloc(sizeof(Node));
      |     ^~~~~~
main.c:11:5: note: include '<stdlib.h>' or provide a declaration of 'malloc'
main.c:11:19: error: 'Node' undeclared (first use in this function)
   11 |   p=malloc(sizeof(Node));
      |                   ^~~~
main.c:11:19: note: each undeclared identifier is reported only once for each function it appears in
main.c:13:36: error: request for member 'a' in something not a structure or union
   13 |   while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
      |                                    ^~
main.c:13:41: error: request for member 'b' in something not a structure or union
   13 |   while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
      |                                         ^~
main.c:13:46: error: request for member 'c' in something not a structure or union
   13 |   while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
      |                                              ^~
main.c:13:51: error: request for member 'd' in something not a structure or union
   13 |   while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
      |                                                   ^~
main.c:13:56: error: request for member 'e' in something not a structure or union
   13 |   while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
      |                                                        ^~
main.c:13:61: error: request for member 'f' in something not a structure or union
   13 |   while(scanf("%d %d %d %d %d %d",p->a,p->b,p->c,p->d,p->e,p->f)!=EOF){
      |                                                             ^~
main.c:14:6: error: request for member 'next' in something not a structure or union
   14 |     p->next=malloc(sizeof(Node));
      |      ^~
main.c:15:8: error: request for member 'next' in something not a structure or union
   15 |     p=p->next;
      |        ^~
main.c:17:4: error: request for member 'next' in something not a structure or union
   17 |   p->next=NULL;
      |    ^~
main.c:20:6: error: request for member 'x' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |      ^~
main.c:20:12: error: request for member 'c' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |            ^~
main.c:20:18: error: request for member 'a' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                  ^~
main.c:20:32: error: request for member 'f' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                ^~
main.c:20:37: error: request for member 'd' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                     ^~
main.c:20:46: error: request for member 'b' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                              ^~
main.c:20:52: error: request for member 'a' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                                    ^~
main.c:20:66: error: request for member 'e' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                                                  ^~
main.c:20:71: error: request for member 'd' in something not a structure or union
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                                                       ^~
main.c:20:77: error: expected ';' before 'p'
   20 |     p->x=(p->c-(p->a*(double)(p->f/p->d)))/(p->b-(p->a*(double)(p->e/p->d)))
      |                                                                             ^
      |                                                                             ;
   21 |     p->y=c-(a*x);
      |     ~                                                                        
main.c:22:27: error: request for member 'x' in something not a structure or union
   22 |     printf("%.3f %.3f\n",p->x,p->y);
      |                           ^~
main.c:22:32: error: request for member 'y' in something not a structure or union
   22 |     printf("%.3f %.3f\n",p->x,p->y);
      |                                ^~
main.c:23:8: error: request for member 'next' in something not a structure or union
   23 |     p=p->next;
      |        ^~