the ratio of the number of desktop computers sold to the number of laptops sold by a dealer is 5 to 9 if 20 desktop computers were sold then how many laptops wree sold?

Let n = number of laptops sold

5 / 9 = 20 / n
5n = 9 * 20
5n = 180
n = 36 laptops

thanks

Given that the ratio of the number of desktop computers sold to the number of laptops sold is 5:9, and 20 desktop computers were sold, we can determine the number of laptops sold using the ratio.

To find the number of laptops sold, we can set up a proportion:

(Number of desktop computers sold) / (Number of laptops sold) = 5 / 9

Substituting the given value, we have:

20 / (Number of laptops sold) = 5 / 9

To isolate the variable, cross-multiply:

9 * 20 = 5 * (Number of laptops sold)

180 = 5 * (Number of laptops sold)

Divide both sides by 5:

180 / 5 = (Number of laptops sold)

36 = (Number of laptops sold)

Therefore, 36 laptops were sold by the dealer.

To find the number of laptops sold, you need to use the given ratio between desktop computers and laptops. The ratio is 5 to 9, which means that for every 5 desktop computers sold, there are 9 laptops sold.

First, determine the ratio as a fraction: 5/9.

Next, divide the number of desktop computers sold (20) by the numerator of the ratio (5):

20 / 5 = 4

This means that for every 1 desktop computer sold, there are 4 laptops sold.

To find the number of laptops, multiply the result by the denominator of the ratio (9):

4 * 9 = 36

Therefore, 36 laptops were sold.