The bag has only almonds and hazelnuts.
Number of hazelnuts = (3x-7)
Number of nuts = (6x + 13)
Total number of nuts = 6x + 13
Total number of nuts = Number of almonds + Number of hazelnuts
Number of almonds = Total number of nuts - number of hazelnuts
Number of almonds = 6x + 13 - (3x - 7)
Number of almonds = 6x + 13 - (3x - 7)
Answer: D) Number of almonds = 6x + 13 - (3x - 7)