Answer:
12
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:
![4m - 7 + m > 51](https://img.qammunity.org/2023/formulas/mathematics/high-school/1av61zddecuet8pike11qyqw3dmye3w2tf.png)
From the inequality, we can solve for M to find the least number of Pokè trading cards that Mateos can have.
![4m - 7 + m > 51 \\ 5m - 7 > 51 \\ 5m - 7 + 7 > 51 + 7 \\ 5m > 58 \\ m > (58)/(5) \\ m > 11.6](https://img.qammunity.org/2023/formulas/mathematics/high-school/yb6zw32q2w4gcvsnd1ugjhgpi5xvt2vpnu.png)
So given the inequality above, we can deduce that the least number of card Mateos can have is 12.