X = 16 21 = 3 X X = 16 X = 21

17 - - DE THI TIENG VIET 2DOC
Lớp 2 DE THI TIENG VIET 2DOC
17 - x = 16 21 = 3 x x = 17 -16 x = 21 : 3 x = 1 x = 7