Pak Anto membeli apel sebanyak (3x+4) kemudian dia membeli lagi sebanyak (2x+5) jumlah apel milik pak Anto sekarang adalah?
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Penjelasan dengan langkah-langkah:
(3x + 4) + (2x + 5)
= 3x + 4 + 2x + 5
= 3x + 2x + 4 + 5
= 5x + 9