第1个回答 2016-01-11
1. X-2/7X=3/4
2. 70%X + 20%X = 3.6
3. 25% + 10X =4/5
4. X - 15%X = 68
5. X+3/8 X=121
6. 5X-3×5/21 =5/11
7. 6X+5 =13.4
8. X÷(6/35) =(26/45) ×(13/25)
9. 2(x-0.6)=4
10. (0.5+x)+x=9.8÷2
11. 2(X+X+0.5)=9.8
12. 25000+x=6x
13. 3200=450+5X+X
14. X-0.8X=6
15. 12x-8x=4.8
16. 7.5*2X=15
17. 1.2x=81.6
18. x+5.6=9.4
19. 52-x =15
20. 91÷x =1.3