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解方程4x+8=6x%4

这个方程应该这样解,移项变号化简为2x=12,x=6

5/6x=4/9 x=4/9÷5/6 x=8/15 x÷3/8=5/6 x=5/6×3/8 x=5/16 2+1/4x=5 1/4x=3 x=12

1/2X4+1/4X6+1/6X8+1/8X10+1/10X12==(1/2-1/4+1/4-1/6+1/6-1/8+1/8-1/10+1/10-1/12)÷2 =(1/2-1/12)÷2=5/12÷2=5/24 1-5/6+7/12-9/20+11/30 =1/6+7/12-9/20+11/30 =(1/2-1/3)+(1/3+1/4)-(1/4+1/5)+(1/5+1/6) =1/2+1/6 =2/6=1/3 这里: 1/6=1/2-1...

1、解方程(x-4)÷3-8=-(x+2)÷2 两边乘6得 2(X-4)-48=-3(X+2) 2X-8-48=-3X-6 (2+3)X=56-6 5X=50 X=10 2、解方程4x-(3a+1)=6x+2a-1 (4-6)X=2a-1+3a+1 -2X=5a X=-5a/2 则-5a/2=10 a=-4 a-a/1=-4+1/4=-15/4

45x-120-8x-12=24x-24-4 45x-8x-24x=120+12-24-4 13x=104 x=104÷13 x=8

原式=0.5*(1/2-1/4+1/4-16+......+1/48-1/50)=0.5*(1/2-1/50)=6/25

2/2x4+2/4x6+2/6x8+...+2/98x100 =2*(1/2-1/4+1/4-1/6+...1/98-1/100) =2*(1/2-1/100) =49/50

8+24+48+840=896

解:-3x+3=66 -3x=66-3 -3x=63 x=-63÷3 x=-21 解:3x+4x=8+5 7x=13 x=13÷7 x=13/7 解:2-3+x=4 x=4-2+3 x=5 解:4x+6+x=26 4x+x=26-6 5x=20 x=20÷5 x=4 解:13x-1=8x+4 13x-8x=4+1 5x=5 x=5÷5 x=1 解:4x-60+3x=3 4x+3x=3+60 7x=63 x=63÷7 x=9 ...

1. 2x4分之1=(1/2-1/4)/2 所以原式等于(1/2-1/4+1/4-1/6......)/2 =(1/2-1/200)/2 =99/400 希望采纳

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