May I get help w these last two answers I have been trying to do them for a long time now I will give u thanks and brainliest

20. Say the number is x.
3(x + 4) + 7(x + 13)
If you want it simplified:
3x + 12 + 7x + 91
10x + 103
21.
3(x + 6) + 2x
3x + 18 + 2x
5x + 18