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Devi bought 7 skirts at $x each, n skirts at $12
each, (2n + 1) skirts at $15 each and 4 skirts at
$3x each. Find the total cost of the skirts she bought.help
Answers
Given:
Devi bought:
7 skirts → $x each
n skirts → $12 each
(2n + 1) skirts → $15 each
4 skirts → $3x each
To find:
The total cost of the skirts Devi bought
Solution:
Here we are given the cost of 1 number of each type of skirts.
So,
We will first find the total cost of each type of skirts bought by Devi separately:
The total cost of 7 skirts = 7 × ($ x) = $ 7x
The total cost of n skirts = n × ($ 12) = $ 12n
The total cost of (2n + 1) skirts = (2n +1) × ($ 15) = $ (30n + 15)
The total cost of 4 skirts = 4 × ($ 3x) = $ 12x
Now, we will add all the cost to get the final answer to the total cost.
∴ The total cost of the skirts is,
= 7x + 12n + (30n + 15) + 12x
= 7x + 12n + 30n + 15 + 12x
= (7x +12x) + (12n + 30n) + 15
= $ [19x + 42n + 15]
Thus, the total cost of the skirts she bought is $ [19x + 42n + 15].
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