If $\frac{x}{a + 1}$ + $\frac{y}{b}$ = 1. Make y the subject of the relation.

To make $y$ the subject of the formula, we need to isolate $y$ on one side of the equation. Let’s break it down step-by-step.

1. Analyze the equation

The given equation is:

2. Explain the concept

To isolate $y$, we follow the order of operations in reverse:

• First, move the term not containing $y$ to the other side of the equation.
• Second, multiply by the denominator of the $y$ term to clear the fraction.

3. Step-by-step solution

Step 1: Subtract $\frac{x}{a + 1}$ from both sides

Step 2: Simplify the right side by finding a common denominator The common denominator is $(a + 1)$:

Step 3: Solve for $y$ by multiplying both sides by $b$

4. Identify the answer

Comparing our result with the given options, it matches option A.

5. Exam Tip

When dealing with algebraic fractions in JAMB, always look for the "common denominator" first. If you have a constant (like $1$) and a fraction, you can always write the constant as a fraction with the same denominator (e.g., $1 = \frac{a+1}{a+1}$) to make subtraction much easier and avoid errors with signs.