文档介绍:1. 3x-7+4x=6x-2 2 .(x+1)-2(x-1)=1-3x
3 .2(x-2)-6(x-1)=3(1-x) 4 . 4 8 x 3 1. 3x-7+4x=6x-2 2 .(x+1)-2(x-1)=1-3x
3 .2(x-2)-6(x-1)=3(1-x) 4 . 4 8 x 3 11 x
3 2
x
5. x 4 x 5 x 3 x 2 6. 1
5 3 2
11 2 2 5 x 2 x 3 2x 5
+3=x-1 8. z+ = z- 9. - - +3=0
9 7 9 7 5 10 3
5x 1 9x 1 1 x
10. = - 11. x 1 +1=x-1
6 8 3 2
3 x 1 x x 2 3x 2
12. |x+5|=5. 13. 1 14. 1
2 3 2 2 4
y 1 y 3y 1 4x y 4
15. y 16. 1 %x+(30-x)×55%=30×65%
2 3 6 5 3
x 5x 11 2x 4 1 1 2
18. 1 ; 19. 2x x ( x 1) (x ;1 )
2 6 3 2 2 3
x 4 x 3 x 3000 x