Jawaban:
a. 180-30x
b. 72+30x
Keduanya= 132
Penjelasan dengan langkah-langkah:
P= 21-6 = 15cm
a. L= 15 × (12-2x) => 180-30x
b. 252-(180-30x)
=> 72+30x
72 + (30x × 2) => 72 + 60
=> 132
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Jawaban:
a. 180-30x
b. 72+30x
Keduanya= 132
Penjelasan dengan langkah-langkah:
P= 21-6 = 15cm
a. L= 15 × (12-2x) => 180-30x
b. 252-(180-30x)
=> 72+30x
72 + (30x × 2) => 72 + 60
=> 132