Answer:
12
Step-by-step explanation:
Let M be the number of Pokè Trading Cards that Mateo has.
Given the information from the question, we know that,
Cecillia has 4M - 7 cards,
Mateo has M cards.
We then can input the condition as a inequality:
[tex]4m - 7 + m > 51[/tex]
From the inequality, we can solve for M to find the least number of Pokè trading cards that Mateos can have.
[tex]4m - 7 + m > 51 \\ 5m - 7 > 51 \\ 5m - 7 + 7 > 51 + 7 \\ 5m > 58 \\ m > \frac{58}{5} \\ m > 11.6[/tex]
So given the inequality above, we can deduce that the least number of card Mateos can have is 12.