3.6-5x=0.2

判断方程的元数只要看方程中有几个未知数就可以了,显然此方程是一元,又因为未知数x还有做除数的而且有多个等式,所以此方程是一元二次方程组.楼主应该可以自行解决吧

是这样的：x^5+x^4=x^3(x^2+x)=(x^2+x)[(x^3-1)+1]=(x^2+x)(x^3-1)+x^2+x=[x(x+1)(x-1)](x^2+x+1)+x^2+x=(x^3-x)

x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊

2x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/7

2x+6=5x5x-2x=63x=6x=26x-28=2x6x-2x=284x=28x=78(x-3.6)=0.8x8x-0.8x=28.87.2x=28.8x=415x-110+7x=11015x+

√2x/5-√2x-3.6/5=0.24√2x/5-3.6/5=0.24√2x-3.6=0.2*5=14√2x=1+3.6=4.6x=4.6/(4√2)=0.8132

x-0.2x=180.8x=18x=18÷0.8x=22.5

2-x+5/6=x-x-1/3两边乘612-x-5=6x-2x+27-x=4x+25x=5x=10.1-0.2x/0.03-1=0.7-x/0.4两边乘1.240-80x-1.2=5.1-3x77x=

x+3/20x=4623x/20=46x=46x20/23=40,x-1/5x=404x/5=40x=200/4=50,x-1/2x=3/4x/2=3/4x=3/2,x-0.2x=180.8x=18x

x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)

x-0.2x=800.8X=80X=100在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了.

5x+3=x-44x=-7x=-7/4----------------4y+11=22,4y=11y=11/4-------------------11x+68-2x=100-9x,9x+68=100

3x+0.5x=4.23.5x=4.2x=4.2÷3.5x=1.24x-2.16=1.24x=3.36x=0.84x-0.2x=160.8x=16x=202x-4x乘以2.5=3.62x-10=3.6

1/2x^2-1/4x+0.2x^3+0.25x-0.5x^2-1/5x^3+0.5x-1=(1/2x^2-0.5x^2)+(0.25x-1/4x)+(0.2x^3-1/5x^3)+0.5x-1=0.

17.6x-3.6x(6x-5)=4；分解等式：4x+3.6x-3.6x(6x-5)=4,进一步得：4(x-1)+3.6x(1-6x+5)=0,再合并得：4（x-1）+9.6x（1-x）=0；解得x=

x=7.7/2=3.85

50％x=2再答：x=4再答：1.2x=2.4再答：x=2再答：1.05x=4.2再答：x=4再答：0.5x=0.2再答：x=0.4再答：请采纳再问：可不可以把式子、过程、答案合并在一起再答：那就是过

5.6x-5x=3.6（5.6-5）x=3.60.6x=3.6x=6

(2x-5)(3x+2)-6(x+1)(x-2)=6x²+4x-15x-10-6(x²+x-2x-2)=6x²-11x-10-6(x²-x-2)=6x²

#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