X X X B) 7X X 2 5 X 17X2 3A) 5 1 2 3 6 1 2 125 3C) 2 5 X8 3 4X 54 3 X 411D) 5X 3 4 X2 4 X 3 5 X2182
Bài 5: Tìm x, biết:
x
x
x
b)
7
x x
2
5
x
1
7
x
2
3
a)
5
1
2
3 6
1
2
12
5
3
c)
2 5
x
8
3 4
x
5
4 3
x
4
11
d)
5
x
3 4
x
2 4
x
3 5
x
2
182