1.147÷5X=7.8 2.40‰X=0.8×3/43.(X-17)÷417=309 4.2/9×18-1/4X=1.55.5X-(7+5又2/3)=2又1/3 6.3又1/2:(X+3)=1/6:27.(X+11.8):9.6=16:12 8.1/3:1/7=(15-X):29.4/X+3=0.6/1.2 10.8X÷(1.8+3)=1.511.21-120‰X=9写得清楚的话高

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1.147÷5X=7.8 2.40‰X=0.8×3/43.(X-17)÷417=309 4.2/9×18-1/4X=1.55.5X-(7+5又2/3)=2又1/3 6.3又1/2:(X+3)=1/6:27.(X+11.8):9.6=16:12 8.1/3:1/7=(15-X):29.4/X+3=0.6/1.2 10.8X÷(1.8+3)=1.511.21-120‰X=9写得清楚的话高

1.147÷5X=7.8 2.40‰X=0.8×3/43.(X-17)÷417=309 4.2/9×18-1/4X=1.55.5X-(7+5又2/3)=2又1/3 6.3又1/2:(X+3)=1/6:27.(X+11.8):9.6=16:12 8.1/3:1/7=(15-X):29.4/X+3=0.6/1.2 10.8X÷(1.8+3)=1.511.21-120‰X=9写得清楚的话高
1.147÷5X=7.8 2.40‰X=0.8×3/4
3.(X-17)÷417=309 4.2/9×18-1/4X=1.5
5.5X-(7+5又2/3)=2又1/3 6.3又1/2:(X+3)=1/6:2
7.(X+11.8):9.6=16:12 8.1/3:1/7=(15-X):2
9.4/X+3=0.6/1.2 10.8X÷(1.8+3)=1.5
11.21-120‰X=9
写得清楚的话高分赏

1.147÷5X=7.8 2.40‰X=0.8×3/43.(X-17)÷417=309 4.2/9×18-1/4X=1.55.5X-(7+5又2/3)=2又1/3 6.3又1/2:(X+3)=1/6:27.(X+11.8):9.6=16:12 8.1/3:1/7=(15-X):29.4/X+3=0.6/1.2 10.8X÷(1.8+3)=1.511.21-120‰X=9写得清楚的话高
1.147÷5X=7.8 5x=147÷7.8=18.84
x=3.77
2.40‰X=0.8×3/4
x=0.8×3/4÷40‰=15
3.(X-17)÷417=309
x-17=309*417=128853
x=128870
4.2/9×18-1/4X=1.5
1/4x=4-1.5
x=10
5.5X-(7+5又2/3)=2又1/3
5x=2又1/3+7+5又2/3
x=3
6.3又1/2:(X+3)=1/6:2
x+3=2*3又1/2:1/6
x=39
7.(X+11.8):9.6=16:12
x+11.8=16*9.6:12
x=1
8.1/3:1/7=(15-X):2
15-x=2*1/3:1/7
x=31/3=10又1/3
9.4/X+3=0.6/1.2
4/x=0.5-3=-2.5
x=-4/2.5=-1.6
10.8X÷(1.8+3)=1.5
8x=1.5*(1.8+3)=7.2
x=0.9
11.21-120‰X=9
120‰X=21-9=12
x=100

不是吧?这种问题?

1.X=3.77
2.X=15
3.X=128870
4.X=10
5.X=3
6.X=39
7.X=1
8.X=10又三分之一
9.X=1.6
10.X=0.9
11.X=100拜托多给点分,我分太少了

1.147÷5X=7.8
5x=147÷7.8=18.84
x=3.77
2.40‰X=0.8×3/4
x=0.8×3/4÷40‰
x=15
3.(X-17)÷417=309
x-17=309*417=128853
x=128870
4. 2/9×18-1/4X=1.5

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1.147÷5X=7.8
5x=147÷7.8=18.84
x=3.77
2.40‰X=0.8×3/4
x=0.8×3/4÷40‰
x=15
3.(X-17)÷417=309
x-17=309*417=128853
x=128870
4. 2/9×18-1/4X=1.5
1/4x=4-1.5
x=10
5.5X-(7+5又2/3)=2又1/3
5x=2又1/3+7+5又2/3
x=3
6. 3又1/2:(X+3)=1/6:2
x+3=2*3又1/2:1/6
x=39
7.(X+11.8):9.6=16:12
x+11.8=16*9.6:12
x=1
8. 1/3:1/7=(15-X):2
15-x=2*1/3:1/7
x=31/3=10又1/3
9. 4/X+3=0.6/1.2
4/x=0.5-3=-2.5
x=-4/2.5=-1.6
10. 8X÷(1.8+3)=1.5
8x=1.5*(1.8+3)=7.2
x=0.9
11.21-120‰X=9
120‰X=21-9=12
x=100
5x=147÷7.8=18.84
楼主慷慨点吧。。。。。给点分

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1.147÷5X=7.8 5x=147÷7.8=18.84
x=3.77
2.40‰X=0.8×3/4
x=0.8×3/4÷40‰=15
3.(X-17)÷417=309
x-17=309*417=128853
x=128870
4. 2/9×18-1/4X=1.5
1/4x=4-...

全部展开

1.147÷5X=7.8 5x=147÷7.8=18.84
x=3.77
2.40‰X=0.8×3/4
x=0.8×3/4÷40‰=15
3.(X-17)÷417=309
x-17=309*417=128853
x=128870
4. 2/9×18-1/4X=1.5
1/4x=4-1.5
x=10
5.5X-(7+5又2/3)=2又1/3
5x=2又1/3+7+5又2/3
x=3
6. 3又1/2:(X+3)=1/6:2
x+3=2*3又1/2:1/6
x=39
7.(X+11.8):9.6=16:12
x+11.8=16*9.6:12
x=1
8. 1/3:1/7=(15-X):2
15-x=2*1/3:1/7
x=31/3=10又1/3
9. 4/X+3=0.6/1.2
4/x=0.5-3=-2.5
x=-4/2.5=-1.6
10. 8X÷(1.8+3)=1.5
8x=1.5*(1.8+3)=7.2
x=0.9
11.21-120‰X=9
120‰X=21-9=12
x=100

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