若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少
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若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少两
若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少
若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少
若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少
两个方程直接相加,就可以得到:7x + 7y + 7z = 7 ∴ x+ y+z = 1
两式相加,得7(x+y+z)=7,(x+y+z)=1
若3X+5Y+6Z=5,4x+2Y+z2,则X+Y+Z的值等于多少
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
乘式的应用 (14 21:8:53) 若4x-3y-6z=0,x+2y-7z=0,则(5x2+2y2-z2)/(2x2-3y2-10z2)等于?
求解数学题已知:4X-3Y-6Z=0 X+2Y-7Z=0 YZ≠0求5X2+2Y2-Z2/2X2-3Y2-10Z2
解代数式4x-3y-6z=o x+2y-7z=0(xyz不等于0)求代数式5x2+2y2-z2/2x2-3y2-10z2的值
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