Clara has to chose 7 more t-shirts
Explanation:
3) Total number t-shirts Clara want to buy = 12
Out the total, she chose = 5 t-shirts
let the remaining t-shirts = t
t + 5 = 12
subtract 5 from both sides:
t + 5 - 5 = 12 - 5
t + 0 = 7
t = 7
Clara has to chose 7 more t-shirts
