Tolong jawab bang bentar lagi dikumpul

2x + 2x + 2 + 3x + 1 = 24
7x + 3 = 24
7x = 24 - 3
7x = 21
x = 21/7
x = 3

2x = 2(3) = 6
2x + 2 = 2(3) + 2= 6 +2 = 8
3x + 1 = 3(3) + 1 = 9 + 1= 10

sisi terpanjang adalah 10