Tolong dijawab ya kak;-)​

Keliling > 42 cm

2(AB + BC) > 42

AB + BC > 42/2

AB + BC > 21

5x + 4 + 2x + 3 > 21

7x + 7 > 21

7x > 21 – 7

7x > 14

x > 14/7

x > 2

Jaeabannya B