String-cheese sticks are sold in packs of 10, and celery sticks in packs of 15. Ms. Sobrino wants to give each of 30 students one string cheese stick and one celery stick. What is the least number of packs she should buy so there are none left over? Plz I really really need help with this

Question

loveboy · Answer

10x = 30
x = 3
So, 3 packs would be needed for string cheese stick.

loveboy · Answer

15y=30
y = 2
So, 2 packs would be needed for celery sticks.