作业帮32x-7x-5x=420
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32x-7x-5x=420
32x-7x-5x=420
32x-7x-5x=420
32x-7x-5x=420
(32-7-5)x=420
20x=420
x=21
32x-7x-5x=420
32-7-5=20 也就是20x=420 x=420/20=21
25x-5x=420
20x=420
x=21
∴原方程的解是x=21
32x-7x-5x=420
32x-(7+5)x=420
32x-12x=420
20x=420
x=420÷20
x=21
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
32x-7x-5x=420怎么解
32x-7x-5x=420
2x(7-3x)+5x(2x+1)=x(4x-3)+32
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
2x+3x+4x+5x+x+6x+7x=100
(16x-13)/(4x-3)-(20x-24)/(4x-5)=(32x-30)/(8x-7)-(40x-43)/(8x-9)求x
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
(x+7/x+6) +(x+9/x+8)=9x=(x+10/x+9) +(x+6/x+5)
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
(x+8)(x+6)(x+7)+(x+5)(x+6)(x+7)=(x+5)(x+8)(x+7)+(x+5)(x+8)(x+6)
不要应用题!31.5 x=83 44-4x=24 48 0.5x=63(x 0.8)0.5=1.6 32x-7x=420 9x=18.9x 7.25X=13 x-19.76=2.41 7x-6.8=14.2 5X 7.5=25 8x 6.4=8.64 4X-8=59x-4x=275 x-9.07=8.72 X+9x=45.2 8x 42=170 3x 4x=161 18x-x=34042 X-60.4=65.6 x-960=780 这些不准有了,要
解方程：32x-7x-5x=240
32-7X-5X=30