方程组①9x-5y+z=-6 ②9x+y+4z=3 ③-9x+3y-5z=0

方程组①9x-5y+z=-6 ②9x+y+4z=3 ③-9x+3y-5z=0 解方程组：{x(x+y+z)=6 {y(x+y+z)=9 {z(x+y+z)=10 解方程组3x+y+z=6,x+3y+z=5,x+y+3z=9｛3x+y+z=6｛x+3y+z=5｛x+y+3z=9 方程组3x-y-z=9,2x+y-2z=6,x+y+z=15 方程组3x+y+2z=10,2x+3y-z=9,x+y+z=6 解方程组 x+y+z=5 2x-y-z=4 3x-2y-z=9 x+y+z+2,4x+2y+z+2,9x+3y+z=6解方程组 解方程组2x+y-3z=1,x-2y+z=6,3x-y+2z=9求x,y,z的值解方程组6x+y-z=0,3x-y+z=5,y+2z=4求x,y,z的值 真的实在解不出来,希望你能帮帮忙! 解方程组：3X+4z=7①,2x+3y+z=9② ,5X-9y+7z=8③,,紧急 已知方程组2x-y+z=5 5x+8y-z=9 1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x-2y=-36②4x-5y=-35③1.解方程组 2x+6y=3① 3x+15y+2z=5② 4x-9y+4z=7③ 2.求方程组5x+3y=-16①6x-2y=-36②4x-5y=-35 接下列方程组 1.x+y=7,y+z=8,x+z=9,2.5x+y+z=6,x+5y+z=-2,x+y+5z=10 三元一次方程组,1.x-2y+z=9 2x+y+3z=10 3x+2y1.x-2y+z=92x+y+3z=103x+2y-z2.3x-5y+2z=14x+5y-z=5X-5y+3z=-23.7x+2y-z=76x-y+z=74x+3y+z=94.4x+3y-2z=-75x-6y+z=12x+z=-25.2x+3y-4z=-23x-2y+5z=262x+5z=31 初一·三元一次方程组第一题：4x+9y=12①,3y-2z=1②,7x+5z=19/4③.第二题：4x-9z=17①,3x+y+15z=18②,x+2y+3z=2③.第三题：2x+4y+3z=9①,3x-2y+5z=11②,5x-6y+7z=13③. ①4x+9y=12 3y-2z=1 7x+5z=19分子4 ②4x-9z=17 3x+y①4x+9y=123y-2z=17x+5z=19分子4②4x-9z=173x+y+15z=18x+2y+3z=2③2x+4y+3z=93x-2y+5z=115x-6y+7z=13这些是三元一次方程组, 若实数x,y,z满足方程组 xy/﹙x+2y﹚=1① yz/﹙y+2z﹚＝2② zx/﹙z+2x﹚③ 则若实数x,y,z满足方程组 xy/﹙x+2y﹚=1① yz/﹙y+2z﹚＝2② zx/﹙z+2x﹚③ 则A.x＋2y＋3z＝0 B.7x＋5y＋2z＝0 C.9x＋6y＋sz＝0 D.10x＋7y＋z 3x-6=-2(y+3z) 3(5z+y)=6-7z 4(x+y)=9+9z 求三元一次方程组 解三元一次方程组 x+y+z=0 ① x+4y+2z=3 ② x+9y-3z=28 ③