Sorry I am seriously stuck! help!
An application store sells a 15" tv for $280 and a 19" tv of the same brand for $400. During a one-week period the store sold 5 more 19'' tv's than 15'' tv's and collected $15,600. what was the total number of tv sets sold?
please explain step by step so i can i work on the other problems that are some what the same to this one THANK YOU
An application store sells a 15" tv for $280 and a 19" tv of the same brand for $400. During a one-week period the store sold 5 more 19'' tv's than 15'' tv's and collected $15,600. what was the total number of tv sets sold?
please explain step by step so i can i work on the other problems that are some what the same to this one THANK YOU
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let x = number of tv sold at $280 and y = number of tv at $400.
During the sale week, he sold x + 5 sets at 400.
Total = x + y or x + (x + 5)
If you multiply each by the price,
280x + 400(x + 5) = 15600
280x + 400x + 2000= 15600
680x = 13600
x = 20 sets at $280
y = x + 5 or 25 sets at $400
Total of 45 sets sold
Proof
20 x $280 + 25 x $400 = $5600 + 10000 = $15600
During the sale week, he sold x + 5 sets at 400.
Total = x + y or x + (x + 5)
If you multiply each by the price,
280x + 400(x + 5) = 15600
280x + 400x + 2000= 15600
680x = 13600
x = 20 sets at $280
y = x + 5 or 25 sets at $400
Total of 45 sets sold
Proof
20 x $280 + 25 x $400 = $5600 + 10000 = $15600