Question

Berapa panjang x? mohon bantuannya

Answer 1

Tinggi bingkai = 90 cm
Lebar bingkai = 30 cm
Tinggi foto = 90 - 5 - x = 85 - x
Lebar foto = 30 - 5 - 5 = 20 cm

90/30 = (85 - x)/20
3 = (85 - x)/20
60 = 85 - x
60 - 85 = -x
-25 = -x
x = 25 cm