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4. Long-sleeve and short-sleeve shirts can be purchased at a concert. A
long-sleeve shirt costs $25 and a short-sleeve shirt costs $15. During a
concert, the shirt vendor collects $8415 from the sale of 441 shirts. How
many short-sleeve shirts were sold? *

Sagot :

Answer:

261 short sleeves were sold

Step-by-step explanation:

25x+15y=8415

(x    +    y=441)-25

25x+15y=8415

-25x-25y= -11025

-10y=-2610

y=261