Final answer:
The value of y cannot be determined with the information provided because there is no relationship given that connects IJ, HG, and EF to solve for y.
Step-by-step explanation:
Given the problem statement, we need to solve for y when we know IJ = y + 3, HG = 8, and EF = 12. However, with the information provided, the value of y cannot be determined directly because there is no relationship given that connects IJ, HG, and EF. If there is an underlying relationship or if these segments are parts of a figure, that information is necessary to solve for y. Without additional context or equations that relate these segments, we cannot find the value of y. Therefore, we cannot complete Step 3 of solving these two equations for Y (or AE, since they will be equal to each other) and substitute Y for AE because we only have one equation with y.