Apa jwban dri soal tsb?
Jawaban Terkonfirmasi
L.foto = 40 – 5 – 5
= 30 cm
t.foto = 60 – 5 – x
= 55 – x
l.foto : l.karton = t.foto : t.karrton
30 : 40 = (55 – x) : 60
40 .(55 – x) = 30 . 60
2200 – 40x = 1800
– 40x = 1800 – 2200
– 40x = – 400
x = – 400/- 40
x = 10 cm
jadi,lebar karton di sebelah bawah = 10 cm