6×3-1.8x=7.2

解方程3*6-1.8x=7.2+0.9x3*6-1.8x=7.2+0.9x18-1.8X=7.2+0.9X18-7.2=0.9X+1.8X10.8=2.7XX=10.8/2.7X=4x=43*6-1.8x=7.2+0.9x18-1.8x=7

5x-x=2.41.5x-x=16.6x-6x=1.82x-2/3x=3/4解方程5x-x=2.44x=2.4x=2.4÷4x=0.61.5x-x=10.5x=1x=1÷0.5x=26.6x-6x=1.80.6x=1.8x=1.8÷0.6x

已知X=4-根号3求(X*X*X*X-6X*X*X-2X*X+18X+23)/(X*X-8X+15)的值紧急,,明天有用,,设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-

1.8x-7.2=x 

解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)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

2x+3x+4x+5x+x+6x+7x=1002x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/727x=100x=100/27；；；；；；；；；；；速率可达粉色礼服螺丝钉解放isskl其实我不会2x+3

x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7x=?x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+71+1/(x+1)-1-1/(x+3)=1+1/x+5)-1-1/(x+7)1/(x+1)+1/(x+7)=1

已知3x*x-x=1,求6x*x*x+7x*x-5x+20003x*x=1+x得6x*x*x+7x*x-5x+2000=3x^2*2x+7x^2-5x+2000=(1+x)2x+7x^2-5x+2000=9x^2-3x+2000=3(3x^

X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 

3x+5x-6x=?3x+5x-6x=(3+5-6)x=2x3x+5x-6x=(3+5-6)x=2x3x+5x-6x=8x-6x=2x3x+5x-6x=(3+5-6)x=2x

3x-1.5=6x+3.7=67.2+2x=10x-2.3=10.76x-2.8x=32x/15=41（解方程的答案）3x-1.5=63x=6+1.53x=7.5x=2.5x+3.7=6x=6-3.7x=2.37.2+2x=102x=10-

3x-1.5=6x+3.7=67.2+2x=10x-2.3=10.76x-2.8x=32x/15=41(解方程的方法）都是一元一次方程,直接求解就可以得出X了.

x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊

x^2+3x-1.8=xx=? 

用秦九韶算法求多项式f(x)=3x^6+12x^5+8x^4-3.5x^3+7.2x^2+5x-13在x=6时的值f(x)=-13+x(5+x(7.2+x(-3.5+x(8+x(12+3x)))))把x=6代入

x+0.3=1.8x-1.5=45x=1.5x÷1.1=33+x=5.4x-6x+0.3=1.8x-1.5=45x=1.5x÷1.1=33+x=5.4x-6=7.60.2x=6x÷5=15 

5x-0.3/0.4=3x-12/0.6-1.8-8x/1.2x-9/6-2+x/3+1=x-x-2/4这里是两道题前一道至8x/1.2为止(1)15.7875(2)1.5

12x-9x=8.76x+18=483（x+2.1)=10.5x+4.8=7.212x-9x=8.73x=8.7x=2.96x+18=486x=30x=53(x+2.1)=10.53x+6.3=10.53x=4.2x=1.4x+4.8=7.

[3/x]-[4/x-1]=6/x-x²[3/x]-[4/x-1]=6/x-x²3（x-1)+4x=-63x-3+4x=-63x+4x=-6+37x=-3x=-3/7

3.268=3X()+2X()+6X()+8X()3.268=3X(1)+2X(0.1)+6X(0.01)+8X(0.001)0.1723.268=3X(1)+2X(0.1)+6X(0.01)+8X(0.001)3.268=3X(1)+2X