Jawaban:
Opsi C
Penjelasan dengan langkah-langkah:
k = 2 ( p + l )
48 = 2 ( 2x - 3 ) + x )
48 = 2 ( 3x - 3 )
48 = 6x - 6
48 = 6 ( x - 1 )
48/6 = x - 1
8 = x - 1
8 + 1 = x
9 = x
C. 9 cm
Dik:
p = 3 kurang dari 2 kali lebar = 2x - 3
l = x
K = 48 cm
Dit:
lebar x
Jwb:
Keliling persegi panjang
K = 2(p+l)
48 = 2(2x-3 + x)
48 = 2(3x - 3)
24 = 3x-3
24+3 = 3x
27 = 3x
x = 9 cm
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Jawaban:
Opsi C
Penjelasan dengan langkah-langkah:
k = 2 ( p + l )
48 = 2 ( 2x - 3 ) + x )
48 = 2 ( 3x - 3 )
48 = 6x - 6
48 = 6 ( x - 1 )
48/6 = x - 1
8 = x - 1
8 + 1 = x
9 = x
Jawaban:
C. 9 cm
Penjelasan dengan langkah-langkah:
Dik:
p = 3 kurang dari 2 kali lebar = 2x - 3
l = x
K = 48 cm
Dit:
lebar x
Jwb:
Keliling persegi panjang
K = 2(p+l)
48 = 2(2x-3 + x)
48 = 2(3x - 3)
24 = 3x-3
24+3 = 3x
27 = 3x
x = 9 cm