(2Đ)A/ 96 – 3.  X  1   42 B/ 15 X  9 X  2 X  72C/ 3X2 3X ...

Câu 9 : Tìm x: (2đ)

a/ 96 – 3.x 1 42 b/ 15 x 9 x 2 x 72

c/ 3

x2

3

x

10