Sebuah balok berukuran panjang = (3×+2)cm, lebar= (×+5),cm dan tinggi = (2×-4)cm. Jika jumlah panjang rusuknya 156cm, maka: A. Susunlah persamaan dalam × B. Tentukan nilai ×
Zuhh
Dik : pnjng = 3x+2 lebr = x+5 tinggi = 2x-4 jumlh pnjng rusuk = 156 cm
maka : a. persamaan dlm x 156 = 4 x (p+l+t) 156 = 4 x (3x+2 + x+5 + 2x-4) 156 = 4 x (6x +3) 156 = 24x + 12
b. nilai x : 156 = 24x + 12 24x = 156-12 x = 144/24 x = 6 cm
pnjng = 3x+2
lebr = x+5
tinggi = 2x-4
jumlh pnjng rusuk = 156 cm
maka :
a. persamaan dlm x
156 = 4 x (p+l+t)
156 = 4 x (3x+2 + x+5 + 2x-4)
156 = 4 x (6x +3)
156 = 24x + 12
b. nilai x :
156 = 24x + 12
24x = 156-12
x = 144/24
x = 6 cm
a) 156 = 4.(3x+2+x+5+2x-4)
156 : 4 = 6x + 3
39 = 6x + 3
39 - 3 = 6x
36 = 6x ------> b) x = 36/6 = 6