Given a 3x4 grid with letters C, Y, R, T in specific cells, and row/column sums, find the values of C, Y, R, and T.

Step 1: Assign variables to each letter and write down the equations from the grid.
Let the values be:

• Cy = $a$
• C = $c$
• R = $b$
• T = $d$

From the grid, we can form a system of equations based on the row and column sums:

Row sums:

1. $a + b + a + d = 15 \implies 2a + b + d = 15$
2. $c + d + a + d = 23 \implies a + c + 2d = 23$
3. $b + c + b + d