4x-2(3-x)=12 7(x-2)=28 4x-3(20-x)=6x-7(9-x) 4(2y+3)=8(1-y)-5

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/07/14 07:21:44

4x-2(3-x)=12 7(x-2)=28 4x-3(20-x)=6x-7(9-x) 4(2y+3)=8(1-y)-5(y-2) 5(x-4)-7(7x-9)=12-3(9-x)

4x-2(3-x)=12
4x-6+2x=12
6x=18
x=3
7(x-2)=28
x-2=4
x=6
4x-3(20-x)=6x-7(9-x)
4x-60+3x=6x-63+7x
6x=3
x=1/2
4(2y+3)=8(1-y)-5(y-2)
8y+12=8-8y-5y+10
21y=6
y=2/7
5(x-4)-7(7x-9)=12-3(9-x)
5x-20-49x+63=12-27+3x
47x=58
x=58/47

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 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 有几道题想请教一下7x=6x-4 x-15=74 3x=2x+5 -5x=8-4x 9y=6y-6 8x=4x+1 7x 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), （1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 9y=3x-(x-1),4(x+y)-(2x+4)=8y x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1