Question

The cost of ball pen is Rs 5 less than half of the cost of fountain pen. Write this statement as a linear equation in two variables.

Answer 1

Solution:

Cost of fountain pen be $x$

Cost of ball pen is $y$

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

$\Rightarrow x-10=2y$

$\Rightarrow x-2y=10$