4+6+7+3+8+2=10+10+10=30
k mik hoac ket ban voi minh hoac ket ban voi me cung huyen thoai thi mik k
\(4+6+7+3+8+2=\left(4+6\right)+\left(7+3\right)+\left(8+2\right)\)\(=10+10+10=30\)
4 + 6 + 7 + 3 + 8 + 2 = (4 + 6) + (7 + 3) + ( 8 + 2)= 10 + 10 + 10 = 30