$6 \times 7 - 5 = 21 + 8 \times 2$ 
Which three numbers can be put in the blanks to make the statement correct?  $6 \times$~\uline{~~~~~~~~~~}~$-$~\uline{~~~~~~~~~~}~$=$ $21 +$~\uline{~~~~~~~~~~}~$\times 2$ 
1: $5$, $4$ and $2$ 
2: $6$, $2$ and $7$ 
3: $7$, $5$ and $8$ 
4: $8$, $7$ and $11$ 
5: $9$, $7$ and $12$ 