14x-7x=56
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21x-6x*x+10x*x-5x=4x*x-12x+5628x=56x=2
7x-14=5x+97x-5x=9+142x=23x=11.53x-12=5x-205x-3x=20-122x=8x=456x=42(x+2)56x=42x+42*256x-42x=8414x=84x
X-2/7X=1/145/7X=1/145X=1/2X=1/10
再答:对吗?再问:,没过程再问:,没过程再问:,没过程再答:不是有过程了吗?再问:哦谢谢
1、56-8X=11+X8X+X=56-119X=45X=52、3X-2=X+1+6X3X-2=7X+17X-3X=-2-14X=-3X=-3/43、7+X=2X+20-14X7+X=20-12XX+
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550120x=550x=55/12=4.583
x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊
3x【7-2x】+5x【2x-1】=4x【x-3】+5621x-6x^2+10x^2-5x=4x^2-12x+5628x=56x=2x的n次方【x的n次方+9x-12】-3【3x的n+1次方-4x的n
3(7-x)=5x-433*7-3X=5X-4321-3X=5X-438X=64得:X=8-----------------------------------9x-14=2x+569X-2X=56+
把括号拆了5x=5x=1
呃呃呃呃呃呃鹅鹅鹅再问:你妹再答:中间是什么符号饿再问:x是未知数再问:*是乘号再答:那我算算再问:额再答:一会我算好拍下来,写麻烦再问:额再答: 再答:怎么样?再问:怎么加你好友啊再答:不
你算错了.X平方项等式两边化掉了.最后算出X=2
5x-14x-2=14x-9x-2=14x-9x-14x=2-23x=2x=-23/2
21x-6x^2+10X^2-5x-4x^2+12x-56=028x-56=0x=21/9x^2y^2*(2yx^2-xy^2-2yx^2+2xy^2)=(1/9x^2y^2)*xy^2=1/9x^3
应该是-2x²,不是-3x²3x²-x=1原式=9x^4-3x³+15x³-5x²+3x²-7x+2001=3x²(3x
5x+2x=33.6,7x=33.6;x=4.8;7x-4x=0.75,3x=3/4;x=1/4;2x+7x+2.1=12,9x=8.1;x=0.9;56x-32x-119=36124x=480;x=
你那是3乘啊还是3X?再问:3X再答:21X-6X`2+10X`2-5X=4X`2-12X+5628X=56X=2
因为14x是分母分母不能等于0所以7x-28=0x=4
#includesintjiesheng(intn)//用于计算阶乘如:3!{if(n=1)rerunn;returnn*hh(n-1)}doubledigui(intn,intx)//用以计算y=x