A) 3 1 – 4 X X – 14 3 X 2X 338B) 5 2 X 3X 2 – 2 5 – 4 X X – 175C) 2X2 3X – 1X 1 5X X 1D) 8 – 5X X 24X – 2X 1 2 X – 2X 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