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The sum of two numbers is 8. The difference of the two numbers is 2. Write a system of equations to find these two numbers and solve. The sum of two numbers is 24. The second number is 6 less than the first. Write a system of equations and solve it find the number. Kerry and Luke biked a total of 18 miles in one weekend. Kerry biked 4 miles more than Luke. Write a system of equations and solve it to find how far each boy biked. The theater group sold adult and student tickets for the play. They sold a total of 500 tickets. Each adult ticket was $8 and each student ticket was $3. The group took in a total of $3000. How many of each type of ticket were sold for the play? The cost of 12 blank recordable CDs and 6 music CDs is $84. The cost of 8 blank recordable CDs and 2 music CDs is $60. Find the cost of each blank recordable CD and each music CD.