Question

帮我求一下x谢谢

x=多少

Answer 1

2（x+4）+2x=7-(x-1)
2x+8+2x=7-x+1
4x+x=8-8
5x=0
x=0

Answer 2

#include
void main()
{
int i,s=1;
long sum;
for(i=1;i<11;i++)
{
s=s*i;
sum+=s;
}
printf("sum=%ld\n",sum);
}