Jawaban singkat:
Penjelasan dengan langkah-langkah:
2 x (panjang + lebar) = keliling persegi panjang
2 x (2x + 5 + x + 4) = 60 cm
2 x (3x + 9) = 60 cm
6x + 18 = 60 cm
6x = 60 cm - 18
6x = 42 cm
x = 42 cm : 6
x = 7 cm
a. Jadi nilai x = 7 cm
b. panjang = (2x + 5) cm
panjang = 14 cm + 5 cm
panjang = 19 cm
c. lebar = (x + 4) cm
lebar = 7 cm + 4 cm
lebar = 11 cm
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Jawaban singkat:
a. nilai x = 7 cm
b. panjang = 19 cm
c. lebar = 11 cm
Penjelasan dengan langkah-langkah:
2 x (panjang + lebar) = keliling persegi panjang
2 x (2x + 5 + x + 4) = 60 cm
2 x (3x + 9) = 60 cm
6x + 18 = 60 cm
6x = 60 cm - 18
6x = 42 cm
x = 42 cm : 6
x = 7 cm
a. Jadi nilai x = 7 cm
b. panjang = (2x + 5) cm
panjang = 14 cm + 5 cm
panjang = 19 cm
c. lebar = (x + 4) cm
lebar = 7 cm + 4 cm
lebar = 11 cm