60x+30(200-10-x)+40*10=200*5
60x+30(200-10-x)+40*10=200*5
60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-
求几道解方程数学题60%x+25=40 x+30%x=52 19-120%x=7 x-10%x=18 (1-25%)x=
解方程 40%x+2=12 x+25%x=10 x-30%x=1.4 15x-60=240 x+1
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
5/8X-30+3/10X+84=X
1/5x-1/2(3-2x)=1,求X .1/7(2x+14)=4-2x,求X .3/10(200+x)-2/10(30
5X+6(X+10)+10(X+30)+6(X+70)+3(X+150)=2730,X等于多少
5X+10(40-X)=360
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),
解方程 (x+5)(200-5x)=(x+5)(200-5x)+x(x+5)