If x/a+1 + y/b = 1. Make y the subject of the relation.

Correct Answer is : b(a+1−x)a+1b(a+1-x)/a+1a+1b(a+1−x)

Correct Answer is : b(a+1−x)a+1b(a+1-x)/a+1a+1b(a+1−x)

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JAMB Mathematics 2018 Paper

Question : 9

Total: 62

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

Solution:

Concept:

Isolate

y

by first expressing

\frac{y}{b}

in terms of

x

Explanation:

Start with:

\frac{x}{a+1}+\frac{y}{b}=1

Subtract

\frac{x}{a+1}

from both sides:

\frac{y}{b}=1-\frac{x}{a+1}

Write

1

with denominator

a+1

\frac{y}{b}=\frac{a+1-x}{a+1}

Multiply both sides by

b

y=\frac{b(a+1-x)}{a+1}

Answer:

y=\frac{b(a+1-x)}{a+1}

This matches option A.

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