axx2-20+axx6=axx3+a axx(2+6)-20=axx(3+1) axx8-20=axx4 axx8-axx4=20 axx(8-4)=20 axx4=20 a=20:4 a=5 Vậy a=5 Trả lời
Giải đáp: axx2-20+axx6=axx3+a (axx2+axx6)-20=axx3+a axx(2+6)-20=axx(3+1) axx8-20=axx4 axx8-axx4=20 axx(8-4)=20 axx4=20 a=20:4 a=5 Vậy a=5 Trả lời
2 bình luận về “a×2-20+a×6=a×3+a tìm a”