tolong jawab. ini tentang sistem persamaan linear 2 variabel

Materi Aljabar

Diketahui
l = p - 6
k = 60 => 2(p+l)=60 => p+l = 30
p+(p-6) = 30
2p = 30 + 6 = 36
p = 36/2 = 18, berarti l = 18 - 6 = 12
L = p×l = 18 × 12 = 216 cm^2