Saya bantu nomor 23 dulu ya. Angka pada nomor 24 ada yang kurang jelas.
12 : (12 + a) = 8 : (8 + 4) ↔ 12 : (12 + a) = 8 : 12 ↔ 8 (12 + a) = 12 × 12 ↔ 96 + 8a = 144 ↔ 8a = 144 – 96 ↔ a = 48/8 = 6 cm
6 : (6 + b) = 4 : (4 + 8) ↔ 6 : (6 + b) = 4 : 12 ↔ 4 (6 + b) = 6 × 12 ↔ 24 + 4b = 72 ↔ 4b = 72 – 24 ↔ b = 48/4 = 12 cm
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Saya bantu nomor 23 dulu ya. Angka pada nomor 24 ada yang kurang jelas.
12 : (12 + a) = 8 : (8 + 4)
↔ 12 : (12 + a) = 8 : 12
↔ 8 (12 + a) = 12 × 12
↔ 96 + 8a = 144
↔ 8a = 144 – 96
↔ a = 48/8 = 6 cm
6 : (6 + b) = 4 : (4 + 8)
↔ 6 : (6 + b) = 4 : 12
↔ 4 (6 + b) = 6 × 12
↔ 24 + 4b = 72
↔ 4b = 72 – 24
↔ b = 48/4 = 12 cm