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1. Use substitution to determine which choice is the solution of the following system of equation .

A. A bookmark has a perimeter of 28 centimeters. Its area is 33 square centimeters. What are the dimensions of the bookmark?

B. Each side of a square classroom is 6 yards long. The school wants to replace the carpet in the classroom with new carpet that costs $50.00 per square yard. How much will the new carpet cost?

C. The sum of two numbers is 68. The difference of the two numbers is 6. What are the two numbers?

Explain how to eliminate x in the system of equations