若X1,X2,X3,X4,X5 满足方程组：2X1+X2+X3+X4+X5=6,①X1+2X2+X3+X4+X5=12 ②X1+X2+2X3+X4+X5=24 ③X1+X2+X3+2X4+X5=48 ④X1+X2+X3+X4+2X5=96 ⑤⑴求X1+X2+X3+X4+X5的值；⑵求3X3+2X4-X5有必要说明一下,凡是跟在X后面的数字都是小数子,比如说X1=X小1

若X1，X2，X3，X4，X5 满足方程组：
2X1+X2+X3+X4+X5=6, ①
X1+2X2+X3+X4+X5=12 ②
X1+X2+2X3+X4+X5=24 ③
X1+X2+X3+2X4+X5=48 ④
X1+X2+X3+X4+2X5=96 ⑤
⑴求X1+X2+X3+X4+X5的值；
⑵求3X3+2X4-X5
解1：1+2+3+4+5
6-X1=12-X2=24-X3=48-X4=96-X5=(X1+X2+X3+X4+X5)
6-X1+12-X2+24-X3+48-X4+96-X5=5(X1+X2+X3+X4+X5)
186-(X1+X2+X3+X4+X5)=5(X1+X2+X3+X4+X5)
(X1+X2+X3+X4+X5)=31
解2：3X3+2X4-X5
(X1+X2+X3+X4+X5)=31
X1+X2+X3+X4+2X5=96
X5=65
X1+X2+X3+2X4+X5=48
X4=17
X1+X2+2X3+X4+X5=24
X3=-7
3X3+2X4-X5
=3*(-7)+2*17-65
=-52

①+②+③+④+⑤(等号左边、右边各相加）得到：6*（x1+x2+x3+x4+x5）=6+12+24+48+96x1+x2+x3+x4+x5=(6+12+24+48+96)/6x1+x2+x3+x4+x5=31⑥①-⑥得:x1=6-31=-25②-⑥得:x2=12-31=-19③-⑥得:x3=24-31=-7④-⑥得:x4=48-...