(1) 8 9x = 7 12 , 7×9x=8×12, 63
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(1)
8 9x = 7 12 , 7×9x=8×12, 63x=96 63x÷63=96÷63, x=1 11 21 ; (2)2.4- 3 2 =3.2-x, 0.9=3.2-x, 0.9+x=3.2-x+x, 0.9+x=3.2 0.9+x-0.9=3.2-0.9, x=2.3; (3) 28 3 x= 49 9 × 9 7 , 28 3 x=7, 28 3 x÷ 28 3 =7 ÷ 28 3 , x= 3 4 ; (4) 3 2 ×3+2.75x= 19 3 , 9 2 +2.75x= 19 3 , 9 2 +2.75x- 9 2 = 19 3 - 9 2 , 2.75x= 11 6 , 2.75x÷2.75= 11 6 ÷2.75, x= 2 3 .
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
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001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
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
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/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)谁会解这道方程题
分式方程.x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)
x/(x-2)+(x+9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)怎样解这道方程
解方程:x/(x-2)+(x-9)/(x-7)=(x+1)/(x-1)+(x-8)/(x-6)
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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