优质解答
1. 1/5 +x=4/5 2. x-3/7=3/7 3. x+4/15=2/5
4. x-13/15=2/15 5. x+2/15=7/15 6. x+2/9=7/9
7. 1/2-x=1/8 8. 1/5+x=9/10 9.5/7-x=7/14
10. 1-(x+5/36)=1/9 11. 5/12+x=5/9 12. 5/9-x=1/18
13. 2/5+x=13/20 14. x+1/5+1/10=4/5 15. x-1/6=1/12
16. x-7/10=1/5 17. 1/6+x=3/4 18. 3/5=x=2/3
19. x+2/9=7/18 20. 1-(4/9+x)=2/9 21. x-5/12+1/6=5/8
22. 1-(x+1/3)=4/15 23. x-1/4-1/3=1/3 24. x+(4/9+5/7)=1+4/9
25. 1/15+x=1/6 26. x-(1/2+1/3)=0 27. 3/4-(3/4-x)=2/3
28. 1-x-1/5=1/10 29.3/5-(x+1/3)=2/15 30. x+1/12+(2x+7/12)=1+2/3
1. 1/5 +x=4/5 2. x-3/7=3/7 3. x+4/15=2/5
4. x-13/15=2/15 5. x+2/15=7/15 6. x+2/9=7/9
7. 1/2-x=1/8 8. 1/5+x=9/10 9.5/7-x=7/14
10. 1-(x+5/36)=1/9 11. 5/12+x=5/9 12. 5/9-x=1/18
13. 2/5+x=13/20 14. x+1/5+1/10=4/5 15. x-1/6=1/12
16. x-7/10=1/5 17. 1/6+x=3/4 18. 3/5=x=2/3
19. x+2/9=7/18 20. 1-(4/9+x)=2/9 21. x-5/12+1/6=5/8
22. 1-(x+1/3)=4/15 23. x-1/4-1/3=1/3 24. x+(4/9+5/7)=1+4/9
25. 1/15+x=1/6 26. x-(1/2+1/3)=0 27. 3/4-(3/4-x)=2/3
28. 1-x-1/5=1/10 29.3/5-(x+1/3)=2/15 30. x+1/12+(2x+7/12)=1+2/3