3:8 = x:2.4
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3:8=x:2.43:8=x:2.43:8=x:2.43:8=x:2.48x=3*2.48x=7.2x=0.93:8=x:2.4两边相互相乘3*2.4=8*X得出:X=0.9内项之积=外项之积例:8x
3:8 = x:2.4
3:8 = x:2.4
3:8 = x:2.4
3:8 = x:2.4
8x=3*2.4
8x=7.2
x=0.9
3:8 = x: 2.4 两边相互相乘 3*2.4=8*X 得出:X=0.9
内项之积=外项之积
例:
8x=2.4*3
x=0.9
`~~~~~~~~~~~~~~~~~~~~求采纳~~~~~~~~~~~~~~~~·
3:8 = x: 2.4 由两内项之积等于两外项之积得 3*2.4=8*X 得出:X=0.9
(20-0.2)X7.8-2.4X(5+0.3)+8.4X(4-0.1) =20X7.8-0.2X7.8-2.4X5-2.4X0.3+8.4X4-8.4X0.1 =156-1.56-12-0.72+33.6-0
2.4x-1.4x-3x=5.2-8
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程3x=x+4,2.6x-8=2.4x,4x+12=10x+3 ,7x=12-×,2.5x=2x+4,5x+3=6x+1,详列计算,
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
X(x平方-6x-9)-x(x平方-8x-15)+2x(3-x)其中x=-六分之一
3x+5x=8x.
4,8-x=3x(x
8x(x-5)=3x
(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8
2.4x-1.6=3.2、7x-4x=2.4、9.7x-2.7x=35、5x+3x=264、8x-6x=0.15、0.8x+1.6=5.6(解方程的过程写清楚)
8x+3(x-2)=5x+(x-3)
X+0.5X=3 X-0.8X=8
问几道解方程x/6-x=(x-3)/6x-1=1/2x+1/4x+1/8x+1/16x+1/32x77/x=2.5*77/x+2.4要注明是哪一题
3.268=3X()+2X()+6X()+8X()
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程】(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
初二分式方程x+3/x+4+x+8/x+9=x+4/x+5+x+7/x+8解(x+3/x+4)+(x+8/x+9)=(x+4/x+5)+(x+7/x+8)
3X*X-2X+6=8,X=?3X*X-2X+6=8,X=?则代数式1.5X*X-X+1=?