SANG NGUYỄN

a, ( 1 2 + 1,5 ) x = 1 5 b, ( − 1 3 5 + x ) : 12 13 = 2 1 6

a, (

1

2

+ 1,5 ) x =

1

5

b, (

1

3

5

+ x ) :

12

13

=

2

1

6

c, ( x-

3

2

) . ( 2x+1 ) >0