方程组通解：X1+X2+X3+3X4+X5=73X1+X2+2X3+X4=-22X2+X3+2X4+6X5=23

Question

方程组通解：X1+X2+X3+3X4+X5=7 3X1+X2+2X3+X4=-2 2X2+X3+2X4+6X5=23

Answer 1

X1+X2+X3+3X4+X5=7 1)
3X1+X2+2X3+X4=-2 2)
x4=-2-3x1-x2-2x3
2X2+X3+2X4+6X5=23 3)
1)+2)+3)
4x1+4x2+4x3+6x4+7x5=28 4)
1)*4-4) 6x4 -3x5=-7
x4=-2-3x1-x2-2x3
x5=(-12-18x1-6x2-12x3+7)/3=-4-6x1-2x2-4x3+7/3
x1x2x3为任意值