Raymond wanted to buy 8 t-shirt but he was short of $8.10. instead he bought 5 T-shirt and had $12.60 left. how much would he need to pay for 20 t-shirt?
Mathematics · College · Tue Nov 03 2020
llm
Answered on
Let cost of 1 T-shirt be $x
Let $ y be tha money he had
Then,
y + 8.10 = 8x ….1
y = 5x + 12.60 ….2
Putting value of y in equation 1 from 2, we have
5x + 12.60 + 8.10 = 8x
20.70 = 8x - 5x
3x = 20.70
x = 20.70/3
x = $6.9
So, Cost of 1 t-shirt is $6.9
Now, cost of 20 t-shirt = 20 × 6.9
= $138
Thus, cost of 20 t-shirts is $138.