Question 1072374
Let n be the number of high-quality downloads sold. Then the number of standard downloads would be 800-n. So:
4.9n+2.8(800-n)=2723
4.9n+2240-2.8n=2723
2.1n=483
n=230
800-n=570
There were 230 high-quality downloads, and 570 standard downloads sold yesterday. &#9786;&#9786;&#9786;&#9786;