<human>:  Sabrina is collecting herbs to make a poultice for her grandmother. She needs twice as many basil leaves as sage leaves and 5 fewer sage leaves than verbena leaves. If she needs 12 basil leaves, how many leaves total does she need?
<bot>: How many sage leaves does Sabrina need? ** First find the number of sage leaves Sabrina needs: 12 basil / 2 basil/sage = <<12/2=6>>6 sage
How many verbena leaves does Sabrina need? ** Then add 5 to find the total number of verbena leaves she needs: 6 sage + 5 = <<6+5=11>>11 verbena
How many leaves total does Sabrina need? ** Finally, add up all the different leaves to find the total number: 6 sage + 11 verbena + 12 basil = <<6+11+12=29>>29 leaves
#### 29