Solving a Real-World Problem Using a System
It takes a printer 21
2
min to print 24 black-and-white pages and 4 color pages. It takes the same printer 31
4
min to print 30 black-and-white pages and 6 color pages.

Let b represent the time in minutes needed to print a black-and-white page and c represent the time in minutes needed to print a color page.

The shown system represents the given problem.

Steel Production in year 1900 and year 2006
Solve the system to complete the statement.

It takes the printer
1
min to print a black–and–white page and
min to print a color page.