tolong di bantu yy teman

l = 2x + 3
p = 4x - 3
K = 72 cm, maka :

K = 2l + 2p
72 = 2(2x + 3) + 2(4x - 3)
72 = 4x + 6 + 8x - 6
72 = 12x
12x = 72
x = 72/12
x= 6 .
jika x = 6, maka :
l = 2x + 3
l = 2(6) + 3
l = 15