Sgt. Johnson ended his mission with 77 rounds for his rifle. If he used one quarter of the initial amount, then replenished one sixth, how much ammo did he start with?
x - x/4 + x/6 = 77
Try 12:
12-3+2 = 11
need our number to be 7 times as large
7x12=84
84-21+14=77
Good problem (I tend to avoid warlike ones, but I know that many high school students like war movies...) and well-explained solution
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