Question

Express the following statements as a linear equation in two variable.

The cost of a ball pen is Rs. 5 less than half the cost of a fountain pen.

Answer 1

Let, the cost of a fountain pen be $Rs.x$

Half the cost of fountain pen $=Rs.\frac{1}{2}x$

Let, the cost of a ball pen be $Rs.y$

According to the question

$y=\frac{1}{2}x-5$