If y + 3 = 8, what is the value of y?

To find the value of y in the equation y + 3 = 8, you start by isolating y. This can be done by subtracting 3 from both sides of the equation.

When you perform this operation, the equation becomes:

y + 3 - 3 = 8 - 3, which simplifies to y = 5.

This shows that the correct value for y is 5.

In this context, understanding the process of isolating the variable is crucial for solving similar equations in algebra. Each step must maintain the equality of the equation, which is why the operation was performed on both sides. If one were to manipulate the equation improperly or overlook basic arithmetic, it could easily lead to incorrect results.

This illustration emphasizes the importance of careful calculations and maintaining equality to arrive at the correct solution.