(1) 3x-42=9x-2 (2) 2x-5(3-2x)=10 (3) 2(2x+1)-(5x-1)=6 (4)2x+
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(1) 3x-42=9x-2 (2) 2x-5(3-2x)=10 (3) 2(2x+1)-(5x-1)=6 (4)2x+14=28-14x
(5)2(x-2)-3(4x-1)=9(1+x)
(6)11x+64+2x=100-9x
(7)15-(8-5x)=7x+(4-3x)
(8)30x-10(10-x)=100
(5)2(x-2)-3(4x-1)=9(1+x)
(6)11x+64+2x=100-9x
(7)15-(8-5x)=7x+(4-3x)
(8)30x-10(10-x)=100
(1) 3x-42=9x-2
3x-9x=-2+42
-6x=40
x=-20/3
(2) 2x-5(3-2x)=10
2x-15+10x=10
12x=25
x=25/12
(3) 2(2x+1)-(5x-1)=6
4x+2-5x+1=6
-x=3
x=-3
(4)2x+14=28-14x
2x+14x=28-14
16x=14
x=7/8
3x-9x=-2+42
-6x=40
x=-20/3
(2) 2x-5(3-2x)=10
2x-15+10x=10
12x=25
x=25/12
(3) 2(2x+1)-(5x-1)=6
4x+2-5x+1=6
-x=3
x=-3
(4)2x+14=28-14x
2x+14x=28-14
16x=14
x=7/8
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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),
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
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
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
1x+2x+3x+4x+5x+6x+7x…+99x=100