apa ya jawaban dan cara nya nomor 29,dan 30? kalo gk jelas di tanya iya

29) mis P = 7x dan L = 5x
Keliling = 2(P+L)
240 = 2(7x+5x)
24x = 240
x = 10
Mk L = 5x = 5×10 = 50 cm (A)

30) kell persegi = kell pers panjang
4(x+3) = 2[(2x-3)+(x+1)]
4x + 12 = 2(3x-2)
4x + 12 = 6x - 4
12+4 = 6x - 4x
2x = 16
x = 8
Mk sisi persegi = x+3 = 8+3 = 11 cm (A)