A) 3 1 – 4 X X – 14 3 X 2X 338B) 5 2 X 3X 2 – 2 5 – 4  X X – 175C) 2X2 3X – 1X 1 5X X 1D) 8 – 5X X 24X – 2X 1 2 X – 2X 2 0

Bài 5: Tìm x, biết:

a)

3 1 – 4

x x



– 1

4 3

x

2



x

3

38

b)

5 2

x

3



x

2 – 2 5 – 4

 

x



x

– 1

75

c)

2

x

2

3

x

– 1



x

1

5

x x

1

d)

8 – 5

x x



2

4

x

– 2



x

1

 

2

x

– 2



x

2

0