Question

The expression 62.4d-21062.4d−210 gives the number of Indian rupees you receive when you exchange \$d$d at the local currency exchange.

How many Indian rupees do you receive when you exchange \$13$13?

Answer 1

It is very easy, you'll see. Let's suppose that x is the value or result, so x=62.4(d)-210, from where you must replace d = 13 (is given in the exercise). So if you want to know how many Indian rupees you receive, operate the equation:

x = 62.4*(13) - 210

x = 811.2 - 210

x = 601.2.

In consequence, the quantity you receive is 601.2 Indian rupees.