1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)2.X=10%X+800+1000

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/04 07:11:22
1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)2.X=10%X+800+1000

1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)2.X=10%X+800+1000
1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)
2.X=10%X+800+1000

1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)2.X=10%X+800+1000
2 x-10%x=800+1000
90%x=1800
x=1800/90%
x=2000
1 (8%-X)/(9%-X)=(4.661-5)/(5.604-5)
(8%-X)(5.604-5)=(9%-X)(4.661-5)
(8%-X)*0.604=(9%-X)*(-0.339)
8%*0.604-0.604x=-9%*0.339+0.339x
0.339x+0.604x=0.064*8%+0.339*9%
0.943x=0.04832+0.03051
0.943x=0.07883
x=0.0836

2、(1-10%)x=1800
0.9x=1800
x=2000
1、x*x-0.17x+0.0072=(-0.339)/(0.604)
x*x-0.17x+0.085*0.085=-5.677
x不存在。

1解由题意得(8%—x)*0.604=(9%-x)*(-0.339)
0.943x=0.048+0.031
x=0.083
2解由题意得(1-0.1)x=1800
x=1620

1.(8%-X)/(9%-X)=(4.661-5)/(5.604-5)
(8%-x)(5.604-5)=(9%-X)(4.661-5)
-0.604X+0.04832= 0.339X-0.03051
0.943X= 0.07783
X=7883/94300(约为0.0836)
2.X=10%X+800+1000
(1-10%)X=1800
90%X=1800
X=1800÷90%
X=2000

已知x=2π+1.求(X-1)+(X-2)+(X-3)+(X-4)+(X-5)+(X-6)+(X-7)+(X-8)+(X-9)+(X-10) x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? (x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5) x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一 (x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8 1.x+9/x+8- x+10/x+9=x+6/x+5- x+7/x+6;2.x³+2/x²-x+1+ x³-9/x²+2x+4=2x-1;3.x-a-b/c+ x-b-c/a+ x-c-a/b=3.(空开的指另一个分式)第二题不用了。 1.若x^2+9x+8=(x^2+8x)+(x+8)=x(x+8)+(x+8)=(x+1)(x+8),x^2-3x-4=x^2-4x+x-4=x(x-4)+(x-4)=(x-4)(x+1),你发现了什么规律?请用等式表达,并且尝试t^2-8t+12;x^2+7x-18;x^2-2xy-3y^2 j急 分解因式:x*x*x*x+2*x*x*x-9*x*x-2x+8 x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 初二分式方程x+3/x+4+x+8/x+9=x+4/x+5+x+7/x+8解(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8) 9x-8=x 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少