(1)(7y-3z)-(8y-5z) (2)-(a5次方-6b)-(7+3b)

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(1)(7y-3z)-(8y-5z)(2)-(a5次方-6b)-(7+3b)(1)(7y-3z)-(8y-5z)(2)-(a5次方-6b)-(7+3b) (1)(7y-3z)-(8y-5z)

(1)(7y-3z)-(8y-5z) (2)-(a5次方-6b)-(7+3b)
(1)(7y-3z)-(8y-5z) (2)-(a5次方-6b)-(7+3b)
 

(1)(7y-3z)-(8y-5z) (2)-(a5次方-6b)-(7+3b)
 

10z-9z-8z-7z-6z-5z-4z-3z-2z+1=?(z是平方,即2次方) 化简(7y-3z)-(8y-5z) {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 1.已知x:y:z=4:5:7,求:(一)2x+3y+z/5z; (二)x+y/y+z 非常急, 已知x::y:z=3:4:5,(1)求x+y分之z的值;(2)若x+y+z=6,求x,y,z. 解三元一次方程3x+4y+z=6 x+5y+z=7 2x+3y-z=8较简便的方法是先消去(),得到二元一次方程组()已知x+y=1,y+z=6,z+x=3,则x+y+z=() 解方程组 2x+3y-z=5 x-2y+2z=6 3x-y-3z=7{ 2x+3y-z=5 (1) { x-2y+2z=6 (2){ 3x-y-3z=7 (3)x=?y=?z=? (1)x/2+y/3=-1 ,x/3+z/4=4 ,y/2+z/4=-4(2)x:y=4:7 ,x:z=3:5 ,x-2y+3z=30(3)x+3y-z=13 ,3x-2y-z=2 ,2x-y+z=-3 解三元一次方程组.速回.(1)X+Y+Z=25 X-Y=1 2X+Y-Z=18(2)X-Y-Z=0 X+Y-3Z=4 2X+3Y-5Z=14(3) X-2Y=-9 Y-Z=3 2Z+x=47(4)3X-y+z=4 2X+3Y-Z=12 X+Y+z=-28(5)4X+9Y=13 3y-2Z=-1 7X+5Z=17速回 我会奖励积分 (1)x+y-z=0 2x-y+3z=2 x-4y-2z+6=0(2)3x+y=6 x+2y-z=5 5x-3y+2z=4(3)x+y+z=-1 4x-2y+3z=5 y-z=8-2x(4)2x+3y=5 3y-4z=3 4z+5x=7三元一次方程,千万别用科学计算器来算裁图, (1)3x+4z=7;2x+3y+z=9;5x-9y+7z=8 (2)3x+4y+z=14;x+5y+2z=17;2x+2y-z=3 x-5y-3z=0 y+z-3x=3 x+y+3z=14 y+4z=3 z+x-3y=5 2x+y+z=7 2x-z=1 x+y-3z=6 3x+y+2z=11三元一次方程(上面的打错了)x-5y-3z=0 y+4z=3 2x-z=1y+z-3x=3 z+x-3y=5 x+y-3z=6x+2y+3z=14 2x+y+z=7 3x+y+2z=11 解三元一次方程 (要有过程) x-y-z=-1 3x+5y+7z=11 4x-y+2z=-1 问5道3元一次方程组题目(1) y=2x-7{ 5x+3y+2z=23x-4z=4 (2) 4x+9y=12{3y-2z=17x+5z=19/4(3)4x-9z=17{3x+y+5z=18x+2y+3z=2(4) 2x+4y+3z=9{3x-2y+5z=115x-6y+7z=13(5) x:y=3:2{y:z=5:4x+y+z=66 (1)x:y:z=3:2:5,2x+3y+8=5 (2)5x-3y+z=5,4x+3y-2z=9x-5y-z=-17 三(四)元一次方程组!1.2z-6=-2(x+3y)3(5y+x)=6-7z4(x+z)=9+9y2.2x-5y=-117y+4z=55x+2z=23.0.4x+0.3y-0.2z=40.6x-0.5y+0.3z=50.3x+0.2y+0.5z=224.x/2+3y/4+5z/3=455.1x+6y/5-4z=150.1x-0.4y+4z/5=55.x+y=7y-z=1z+2u=4u-3x=-11 已知3x=4Y,5Y=6Z,求 (1)x:y:z;(2)x+y/y+z.请说明道理, (3x+2y-5z+1)(-3x+2y-5z-1)