X-X/4+1/5X=95 1.25：0.25=X：3.2 4/9X+0.5=13/9X-1.3

来源：学生作业帮编辑：百度作业网作业帮分类：数学作业时间：2024/08/10 15:46:38

X-X/4+1/5X=95 1.25：0.25=X：3.2 4/9X+0.5=13/9X-1.3
4/7X÷2/3=4/7 (7又5/7-0.8+2又2/7)×12.5
其他的不用求了就求第2题和3题求X的值

X-X/4+1/5X=95
X-1/4X+1/5X=95
X-5/20X+4/20X=95
19/20X=95
X=95÷19/20
X=95×20/19
X=100

1.25：0.25=X：3.2
X=1.25÷0.25×3.2
X=16

4/9X+0.5=13/9X-1.3
13/9X-4/9X=1.3+0.5
X=1.8

4/7X÷2/3=4/7
4/7X=4/7 ×2/3
X= 2/3

(7又5/7-0.8+2又2/7)×12.5
=(54/7+16/7-4/5)×25/2
=38/7×25/2-4/5×25/2
=950/14-10
=810/14
=57又6/7

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), (4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1) （1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 4x+9x=13x 1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少求方程解x-5/x-4+x-9/x-8=x-8/x-7+x-6/x-5