2X+4(8-X)=20 10X-6(10-X)=36 10X-6(16-X)=64 0.5X+0.1(8-X)=2 4
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2X+4(8-X)=20 10X-6(10-X)=36 10X-6(16-X)=64 0.5X+0.1(8-X)=2 4X-2(8-X)=14
用移项解方程
用移项解方程
2X+4(8-X)=20
2x+32-4x=20
-2x+12=0
x=6
10X-6(10-X)=36
10x-60+6x=36
16x=96
x=6
10X-6(16-X)=64
10x-96+6x=64
16x=160
x=10
0.5X+0.1(8-X)=2
0.5x+0.8-0.1x=2
0.4x=1.2
x=3
4X-2(8-X)=14
4x-16+2x=14
2x=30
x=15
2x+32-4x=20
-2x+12=0
x=6
10X-6(10-X)=36
10x-60+6x=36
16x=96
x=6
10X-6(16-X)=64
10x-96+6x=64
16x=160
x=10
0.5X+0.1(8-X)=2
0.5x+0.8-0.1x=2
0.4x=1.2
x=3
4X-2(8-X)=14
4x-16+2x=14
2x=30
x=15
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
2X+4(8-X)=20 10X-6(10-X)=36 10X-6(16-X)=64 0.5X+0.1(8-X)=2 4
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.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
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
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?